{"id":8566,"date":"2009-06-22T14:37:00","date_gmt":"2009-06-22T14:37:00","guid":{"rendered":"http:\/\/melotopia.net\/b\/?p=8566"},"modified":"2009-06-22T14:37:00","modified_gmt":"2009-06-22T14:37:00","slug":"%ec%88%98%eb%a0%b4-%eb%b0%98%ea%b2%bd","status":"publish","type":"post","link":"http:\/\/melotopia.net\/b\/?p=8566","title":{"rendered":"\uc218\ub834 \ubc18\uacbd"},"content":{"rendered":"<div class=\"desc\">\n        \uc218\uc5f4\uc744 \uacf5\ubd80\ud558\ub2e4\ubcf4\uba74 \uc218\uc5f4\uc758 \ud569(Series, \uae09\uc218)\uc744 \uacf5\ubd80\ud558\uac8c \ub41c\ub2e4.<br \/>\n        <br \/>\n        \uc218\uc5f4\uc740 \uc138\uac00\uc9c0 \uc885\ub958\ub85c \ub098\ub20c \uc218 \uc788\ub294\ub370, \ub4f1\ucc28\uc218\uc5f4, \ub4f1\ube44\uc218\uc5f4, \uadf8 \uc678\uc758 \uae30\ud0c0\ub4f1\ub4f1\uc774 \uc788\ub2e4. (\ub180\ub78d\uac8c\ub3c4, \ubaa8\ub4e0 \uc218\uc5f4\uc740 \uc774\ub807\uac8c \uc138\uac00\uc9c0 \uc885\ub958\ub85c \ub098\ub20c \uc218 \uc788\ub2e4. -_-; \uc99d\uba85\uc740 \uc0dd\ub7b5.)<\/p>\n<p>        \uadf8\uc911, \ub4f1\ube44\uc218\uc5f4\uc758 \ud569\uc740 \uba71\uae09\uc218(Power Series)\ub77c\uace0 \ubd80\ub978\ub2e4. \ud798\uc388 \ub188\ub4e4\uc744 \ub298\uc5b4\ub193\uc740 \uac83\uc774 \uc544\ub2c8\ub77c\ub294 \uc810\uc5d0 \uc8fc\uc758. Power\ub97c \uc65c &#8220;\uba71&#8221;\uc774\ub77c\uace0 \ubc88\uc5ed\ud558\ub294\uc9c0\ub294 \ub3c4\uc800\ud788 \ubaa8\ub974\uaca0\ub2e4.<\/p>\n<p>        \uc544\ubb34\ud2bc \ub4f1\ube44\uc218\uc5f4\uc774\ub77c\ub294 \uac83\uc740 \uc5b4\ub5a4 \ud2b9\uc815\ud55c \uc218(\uccab\ubc88\uc9f8 \ud56d)\uc5d0\uc11c \uc2dc\uc791\ud574\uc11c, \uacc4\uc18d \ub611\uac19\uc740 \uc218\ub97c \uacf1\ud574\uc11c \ub9cc\ub4e0 \uc218\uc5f4\uc774\ub2e4. \uac00\ub839<br \/>\n        <\/p>\n<div class=\"txc-textbox\" style=\"border: 1px solid rgb(254, 254, 184); padding: 10px; background-color: rgb(254, 254, 184);\">\n         1, 2, 4, 8, 16, 32&#8230;\n        <\/div>\n<p>        \uc774\ub7f0 \uc218\uc5f4\uc740 1\uc5d0\uc11c \uc2dc\uc791\ud574\uc11c, 2\ub97c \uacc4\uc18d \uacf1\ud558\uba74 \ub9cc\ub4e4 \uc218 \uc788\ub2e4. (\ubb3c\ub860 \ub2e4\ub978 \ubc29\ubc95\uc73c\ub85c\ub3c4 \uc5ec\uc12f\ubc88\uc9f8 \ud56d \uae4c\uc9c0 \uc77c\uce58\ud558\ub294 \uc218\uc5f4\uc740 \ub9cc\ub4e4 \uc218 \uc788\uc9c0\ub9cc, \ubb50 \uadf8\ub7f0\uc598\uae30\ub97c \ud558\uc790\ub294\uac74 \uc544\ub2c8\ub2c8\uae4c&#8230;)<\/p>\n<p>        \ub4f1\ube44\uc218\uc5f4\uc740 \ud765\ubbf8\ub85c\uc6b4 \uc131\uc9c8\uc774 \uc788\ub2e4. \uc704\uc758 \uc218\uc5f4\uc744 \ubcf4\uba74, 32\ub294 \uadf8 \uc55e\uc5d0 \uc788\ub358 \ubaa8\ub4e0 \ud56d\ub4e4\uc758 \ud569\ubcf4\ub2e4 1\uc774 \ud06c\ub2e4. 16\ub3c4 \uadf8\ub807\ub2e4. 16\ubcf4\ub2e4 \uc791\uc740 \ud56d\ub4e4\uc758 \ud569\ubcf4\ub2e4 1\uc774 \ud06c\ub2e4. 2\ub97c \uacc4\uc18d \uacf1\ud574\uc11c \uc5bb\uc5b4\uc9c0\ub294 \uc218\ub294 \ud56d\uc0c1 \uadf8 \ud56d\uae4c\uc9c0 \ub2e4 \ub354\ud55c \uc218\uc5d0 1\uc744 \ub354\ud558\uba74 \ub41c\ub2e4. \uc77c\ubc18\uc801\uc778 \ub4f1\ube44\uc218\uc5f4\uc758 \ud569\uc744 \uc54c\uc544\ub0b4\ub294 \uacf5\uc2dd\uc740 \uc720\uba85\ud558\ub2c8\uae4c \uadf8\ub0e5 \ub118\uc5b4\uac00\ub3c4\ub85d \ud558\uc790. \uc794\uba38\ub9ac\ub97c \uc870\uae08\ub9cc \uad74\ub9ac\uba74 \ub2f9\uc2e0\ub3c4 \uc99d\uba85\ud560 \uc218 \uc788\ub2e4.<br \/>\n        <br \/>\n        (\uc774\ubbf8 \uc99d\uba85\ud560 \uc904 \uc544\ub294 \uc0ac\ub78c\uc740 \ud328\uc2a4.)<\/p>\n<p>        \uc55e\uc5d0\uc11c \ub4f1\ube44\uc218\uc5f4\uc758 \ud569\uc744 Power Series\ub77c\uace0 \ubd88\ub800\ub294\ub370, \uc77c\ubc18\uc801\uc73c\ub85c Power Series\ub294 \ub4f1\ube44\uc218\uc5f4\uc758 \ud569\ubfd0\ub9cc \uc544\ub2c8\ub77c, \uc5b4\ub5a4 \ud2b9\uc815\ud55c \uc218 x\ub97c \ub450\uace0\uc11c x\uc758 \uc81c\uacf1\uc218\ub4e4\uc758 1\ucc28\uacb0\ud569\uc73c\ub85c \ud45c\ud604\ub418\ub294 \uac83\ub4e4\uc744 \ub9d0\ud55c\ub2e4. \uc5ec\uae30\uc11c 1\ucc28 \uacb0\ud569\uc774\ub780, x\uc758 \uc81c\uacf1\uc218\ub4e4\uc774 \uc5ec\ub7ec\uac1c \uc788\uc744 \ub54c, n\uc81c\uacf1\uc218\ub4e4\uc740 \uc5b4\ub5a4 \ud2b9\uc815\ud55c \uacc4\uc218\uc778 C(n)\uc744 \uac16\uace0, $C(n)x^n$\uc73c\ub85c \ud45c\ud604\ub418\ub294 \ud56d\uc744 \ubaa8\ub450 \ub354\ud55c \uac83\uc744 \ub73b\ud55c\ub2e4. \uc989, \uc5b4\ub5a4 \uc218\ub97c \uacf1\ud558\uace0(\uc774 \uc218\ub294 x\uc5d0 \ub300\ud574\uc11c\ub294 \ubcc0\ud558\uc9c0 \uc54a\ub294\ub2e4. x\uac00 \ud06c\ub358 \uc791\ub358 \uc544\ubb34\ud2bc \uc815\ud574\uc9c4 \uc0c1\uc218\ub2e4.) \uadf8\ub7f0\uac83\ub4e4\uc744 \ub354\ud558\uba74 1\ucc28 \uacb0\ud569\uc774\ub2e4.<\/p>\n<p>        \uadf8\ub7f0\ub370 \ud55c\uac00\uc9c0 \ud765\ubbf8\ub85c\uc6b4 \uc810\uc740 C(n)\uc740 \ub610\ud55c \uc218\uc5f4\uc774\ub77c\ub294 \uc810\uc774\ub2e4. \uc218\uc5f4\uc774 \ub098\uc62c \ub54c\ub294 \uc5b8\uc81c\ub098 \uc218\ub834\uc131\uc744 \ucc3e\uc544\ubd10\uc57c \ud55c\ub2e4. \uc65c\ub0d0\ud558\uba74 \uc774 \uc218\uc5f4\uc774 \uc5b8\uc81c \uc5b4\ub514\uc11c \uc4f0\uc774\ub294 \uc218\uc5f4\uc774 \ub420\uc9c0 \ubaa8\ub974\ub294\ub370, \uc5b4\uca0c\ub4e0 \uc218\ub834\ud560\uc9c0 \ubc1c\uc0b0\ud560\uc9c0\ub97c \uc54c\uc544\uc57c \ub300\ucda9 \uba87\ubc88\uc9f8\uae4c\uc9c0 \uacc4\uc0b0\ud558\uba74 \ub2e4\ub4e4 \uadf8 \uadfc\ucc98\uc5d0 \uc788\uaca0\uad6c\ub098 \ud558\ub4e0\uac00, \ub610\ub294 \ubc1c\uc0b0\ud55c\ub2e4\uba74 \uacc4\uc0b0 \uc790\uccb4\ub97c \ud3ec\uae30\ud558\ub4e0\uac00 \ud560 \ud14c\ub2c8\uae4c \ub9d0\uc774\ub2e4.<\/p>\n<p>        \uc5b4\uca0c\ub4e0 C(n)\uc740 \uc6d0\ub798\ub294 Power Series\uc5d0\uc11c \ub098\uc628 \uc560\ub4e4\uc774\ubbc0\ub85c Power Series\uac00 \uc218\ub834\ud558\ub4e0\uc9c0 \ud574\uc57c \ud560 \uac83\uc774\ub2e4. x\uc5d0 1\uc744 \ub123\uc5b4\ubcf4\uc790. \uadf8\ub7fc Power Series\ub294 \uc774\uc81c \ud3c9\ubc94\ud55c \uc218\uc5f4\uc758 \ud569\uc774 \ub41c\ub2e4. \uc774 \ud569\uc744 \uc218\uc5f4\uc758 \ub05d\uae4c\uc9c0 \ub354\ud574\ubcf4\uc790. (\ubb34\ud55c\uae09\uc218\ub97c \uacc4\uc0b0\ud55c\ub2e4\ub294 \ub73b\uc774\ub2e4.) \uc218\ub834\ud560\uae4c? \uadf8\uac70\uc57c C(n)\uc758 \ubaa8\ub4e0 \ud569\uc774 \uc6d0\ub798 \uc218\ub834\ud588\uc73c\uba74 \uc218\ub834\ud560 \uac83\uc774\uace0, \uc544\ub2c8\uba74 \ub9c8\ub294 \uac83\uc774\uaca0\ub2e4. \ub2f9\uc5f0\ud558\ub2e4. \ub9cc\uc57d x\uc5d0 0\uc744 \ub123\uc5b4\ubcf4\uc790. \uadf8\ub7fc \uc5b4\ub5bb\uac8c \ub420\uae4c? \uc774 \uacbd\uc6b0\uc5d0 C(n)\uc758 \ud569\uc740 C(0)\uc73c\ub85c \uc218\ub834\ud55c\ub2e4. \ud655\uc2e4\ud558\uac8c \uc218\ub834\ud560 \uac83\uc774\ub2e4. \ubb3c\ub860 \uc774\uac74 \uac04\ub2e8\ud558\ubbc0\ub85c \uc99d\uba85\ud558\uc9c0\ub294 \uc54a\uaca0\ub2e4. \uc790, \uc774\uc81c \ubb54\uac00 \uae68\ub2ec\uc74c\uc774 \uc640\uc57c \ud55c\ub2e4. x\uc5d0\ub2e4\uac00 0\uc744 \ub123\uc744 \ub54c\ub294 \uc218\ub834\ud55c\ub2e4. 0\uc774 \uc544\ub2cc \uc5b4\ub5a4 \uc22b\uc790\ub97c \ub123\uc73c\uba74 \uc218\ub834\ud560 \uc218\ub3c4 \uc788\uace0 \uc218\ub834\ud558\uc9c0 \uc54a\uc744 \uc218\ub3c4 \uc788\ub2e4. \ub9cc\uc57d x\uc5d0\ub2e4\uac00 \uc544\uc8fc \ud070 \uc218\ub97c \ub123\ub294\ub2e4\uba74? \uc5b4\ub9c8\uc5b4\ub9c8\ud558\uac8c \ud070 \uc218\ub97c \ub123\uac8c \ub418\uba74 \uc544\ub9c8 \ubc1c\uc0b0\ud558\uc9c0 \uc54a\uc744\uae4c? C(n)\uc774 \uc544\ubb34\ub9ac \uc791\ub2e4\uace0 \ud574\ub3c4, x\uc758 \uc9c0\uc218\ub294 \uacc4\uc18d\ud574\uc11c \ucee4\uc9c0\uae30 \ub54c\ubb38\uc5d0 \uc5b8\uc820\uac00\ub294 \ubc1c\uc0b0\ud558\uc9c0 \uc54a\uc744\uae4c? \uadf8\ub807\uc9c0 \uc54a\uc744\uae4c?<\/p>\n<p>        Power series\ub97c \ub9cc\ub4dc\ub294 x\uc5d0\ub2e4\uac00 \uc5b4\ub5a4 \uc218\ub97c \ub123\uc5c8\uc744 \ub54c, \uadf8 \uc218\uc5f4\uc774 \uc218\ub834\ud558\ub294\uc9c0 \uc218\ub834\ud558\uc9c0 \uc54a\ub294\uc9c0\ub294 \uc804\uc801\uc73c\ub85c C(n)\uc5d0 \ub2ec\ub824\uc788\ub2e4. \ub9cc\uc57d C(n)\uc774 \ubaa8\ub4e0 n\uc5d0 \ub300\ud574\uc11c 0\uc774\ub77c\uba74 \ub2f9\uc5f0\ud788 Power Series\ub294 \ubaa8\ub4e0 x\uc5d0 \ub300\ud574\uc11c \uc804\ubd80 \uc218\ub834\ud55c\ub2e4. \uc774\uac83 \ub610\ud55c \uc99d\uba85\ud558\uc9c0 \uc54a\ub294\ub2e4. \uc6b0\ub9ac\uac00 \uc54c\uc544\ub0b4\uc57c \ud558\ub294 \uac83\uc740 \uc218\ub834\uacfc \ubc1c\uc0b0 \uc0ac\uc774\uc758 \uacbd\uacc4\uc774\ub2e4. \ubd84\uba85\ud788, x\uac00 0\uc77c\ub54c\ub294 \uc218\ub834\ud558\uace0 \uc5c4\uccad\ub098\uac8c \ud070 \uc218\uc77c\ub54c\ub294 \ubc1c\uc0b0\ud560 \uac83 \uac19\ub2e4. \uadf8\ub807\ub2e4\uba74 \uc6b0\ub9ac\ub294 \uadf8 \uacbd\uacc4\ub97c \uc5b4\ub5bb\uac8c \uc54c\uc544\ub0bc \uc218 \uc788\uc744\uae4c? \uc544\ub2c8, \uadf8 \uc774\uc804\uc5d0, \uadf8\ub7f0 \uacbd\uacc4\uac00 \uc874\uc7ac\ud558\uae34 \ud558\ub294\uac78\uae4c?<\/p>\n<p>        \ubb50, \uc774\uac74 C(n)\uc774 \uc5b4\ub5a4 \uc218\uc5f4\uc778\uc9c0\ub9cc \uc54c \uc218 \uc788\uc73c\uba74 \uadf8 \uacbd\uacc4\ub97c \ud655\uc2e4\ud558\uac8c \uc54c \uc218 \uc788\ub2e4. \uae09\uc218\uc758 \uc218\ub834\uc131\uc5d0 \ub300\ud55c \uc81c\uacf1\uadfc \uac80\uc0ac\ub97c \ud558\uba74 \ub41c\ub2e4.<br \/>\n        <br \/>\n        \uc815\ud655\ud788, C(n)\uc758 Limit Supremum\uc758 \uc5ed\uc218\uac00 \ubc14\ub85c \uadf8 \uacbd\uacc4\uc9c0\uc810\uc774 \ub41c\ub2e4. x\uc758 \uc808\ub300\uac12\uc774 \uadf8\ubcf4\ub2e4 \uc791\uc73c\uba74 \uae09\uc218\ub294 \uc218\ub834\ud558\uace0, \uc808\ub300\uac12\uc774 \ub354 \ud06c\ub2e4\uba74 \uae09\uc218\ub294 \ubc1c\uc0b0\ud55c\ub2e4. \ub9cc\uc57d x\uc758 \uc808\ub300\uac12\uc774 \uc815\ud655\ud788 \ubc14\ub85c \uadf8 \uacbd\uacc4\uc9c0\uc810\uc5d0 \uac78\uccd0 \uc788\ub2e4\uba74, \uadf8\ub550 \uc5b4\ub5bb\uac8c \ub420\uc9c0 \ubaa8\ub978\ub2e4. \uadf8\ub54c \uadf8\ub54c \ub2e4\ub974\ub2e4.<\/p>\n<p>        \uc6d0\ub798\ub294 \uc774 \uc99d\uba85\uc744 \uc2e4\uc73c\ub824\uace0 \ud588\uc9c0\ub9cc, W. Rudin\uc758 Principles of Mathematical Analysis (3rd Edition)\uc758 69\ucabd\uc5d0 \ub531 2\uc904\uc9dc\ub9ac \uc99d\uba85\uc774 \uc788\uc5b4\uc11c \ud765\ubbf8\uac00 \ub5a8\uc5b4\uc838 \ubc84\ub838\ub2e4. \uadf8 \uc99d\uba85\uc774 \uc65c \ub9de\ub294\uc9c0 \uc124\uba85\ud558\ub824\uba74, \ubc18\ub300\ub85c \uadf8 \ucc45\uc758 \uccab \ud398\uc774\uc9c0\ubd80\ud130 \uadf8 \ubd80\ubd84\uae4c\uc9c0 \uc804\ubd80 \uac15\uc758\ub97c \ud574\uc57c \ud558\uae30 \ub54c\ubb38\uc5d0 \ub108\ubb34 \ud798\ub4e4\ub2e4.<\/p>\n<p>        \uc544\ubb34\ud2bc. \uc911\uc694\ud55c\uac74, \uc218\ub834\uacfc \ubc1c\uc0b0\uc758 \uacbd\uacc4\uc810\uc774 \uc788\uc5b4\uc11c \uadf8\ubcf4\ub2e4 \uba40\ub9ac \uc788\uc73c\uba74 \ubc1c\uc0b0\ud558\uace0 \uac00\uae4c\uc6b0\uba74 \uc218\ub834\ud55c\ub2e4\ub294 \uac83\uc774\ub2e4.<br \/>\n        <\/p>\n<div style=\"width:100%;margin-top:30px;clear:both;height:30px\">\n<div style=\"width:31px;float:left;\">\n<a href=\"\/toolbar\/popup\/abuseReport\/?entryId=1380\" onclick=\"window.open(this.href, 'tistoryThisBlogPopup', 'width=550, height=510, toolbar=no, menubar=no, status=no, scrollbars=no'); return false;\"><br \/>\n<img data-recalc-dims=\"1\" decoding=\"async\" alt=\"\uc2e0\uace0\" src=\"https:\/\/i0.wp.com\/t1.daumcdn.net\/tistory_admin\/static\/ico\/ico_spam_report.png\" style=\"border:0\"\/><br \/>\n<\/a>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\uc218\uc5f4\uc744 \uacf5\ubd80\ud558\ub2e4\ubcf4\uba74 \uc218\uc5f4\uc758 \ud569(Series, \uae09\uc218)\uc744 \uacf5\ubd80\ud558\uac8c \ub41c\ub2e4. \uc218\uc5f4\uc740 \uc138\uac00\uc9c0 \uc885\ub958\ub85c \ub098\ub20c \uc218 \uc788\ub294\ub370, \ub4f1\ucc28\uc218\uc5f4, \ub4f1\ube44\uc218\uc5f4, \uadf8 \uc678\uc758 \uae30\ud0c0\ub4f1\ub4f1\uc774 \uc788\ub2e4. (\ub180\ub78d\uac8c\ub3c4, \ubaa8\ub4e0 \uc218\uc5f4\uc740 \uc774\ub807\uac8c \uc138\uac00\uc9c0 \uc885\ub958\ub85c \ub098\ub20c \uc218 \uc788\ub2e4. -_-; \uc99d\uba85\uc740 \uc0dd\ub7b5.) \uadf8\uc911, \ub4f1\ube44\uc218\uc5f4\uc758 \ud569\uc740 \uba71\uae09\uc218(Power Series)\ub77c\uace0 \ubd80\ub978\ub2e4. \ud798\uc388 \ub188\ub4e4\uc744 \ub298\uc5b4\ub193\uc740 \uac83\uc774 \uc544\ub2c8\ub77c\ub294 \uc810\uc5d0 \uc8fc\uc758. Power\ub97c \uc65c &#8220;\uba71&#8221;\uc774\ub77c\uace0 \ubc88\uc5ed\ud558\ub294\uc9c0\ub294 \ub3c4\uc800\ud788 \ubaa8\ub974\uaca0\ub2e4. \uc544\ubb34\ud2bc \ub4f1\ube44\uc218\uc5f4\uc774\ub77c\ub294 \uac83\uc740 \uc5b4\ub5a4 \ud2b9\uc815\ud55c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-8566","post","type-post","status-publish","format-standard","hentry","category-academic"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8o6gA-2ea","jetpack-related-posts":[],"jetpack_likes_enabled":true,"_links":{"self":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts\/8566","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8566"}],"version-history":[{"count":0,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts\/8566\/revisions"}],"wp:attachment":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8566"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8566"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8566"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}