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Function: driver
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Cacher.php
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Function: initiateCache
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Cacher.php
Line: 22
Function: driver
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Cacher.php
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Function: initiateCache
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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Line: 17
Function: _error_handler
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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Line: 18
Function: _error_handler
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: model
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: initMenu
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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Line: 799
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Line: 315
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Function: _error_handler
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: model
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: getFloatingMyInfo
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
Line: 559
Function: get_footer
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once
수학동아 - 폴리매스
함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
Cn
2019.02.23 01:19
조회 599
수직선에서 점p가 원점에서 출발하여 단위시간동안 단위 거리만큼 이동한다고 생각해보자.
+방향으로 움직일 확률이 p, -방향으로 움직일 확률이 1-p라고 했을때 ,
점p가 언젠가는 원점으로 돌아올 확률을 구하여라.
-
code
Lv.5
2019.02.23 07:07
p가 1이 아닌이상,
점p가 원점으로 돌아올 확률은 1입니다.
-
디듀우
Lv.7
2019.02.23 07:17
좋아요0
-
Cn
Lv.1
2019.02.23 09:24
좋아요0
-
아인수타인
Lv.12
2019.02.23 09:45
아주 작은 확률이긴 하지만 계속 +방향으로 갈 수도 있으므로 1은 아닌 거 같은데요?
좋아요0
-
code
Lv.5
2019.02.24 17:44
아무리 p가 1에 가깝거나 0에 가깝다 하더라도 어쨌든 원점으로 언젠가는 돌아올 수 있습니다.
(p=0,p=1 제외)
좋아요0
-
Cn
Lv.1
2019.02.24 22:23
p가 1/2가아니면 돌아올확률은 1이아닙니다;
좋아요0
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