Severity: Notice
Message: Trying to access array offset on value of type null
Filename: ver3/Article.php
Line Number: 124
Backtrace:
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Article.php
Line: 124
Function: _error_handler
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once
Severity: Notice
Message: Trying to access array offset on value of type null
Filename: ver3/Article.php
Line Number: 125
Backtrace:
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Article.php
Line: 125
Function: _error_handler
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once
(a+b)^2은 완전제곱식으로써 이항정리를 만족하고 파스칼의 삼각형의 일부 입니다.(계수)
그런데 이항정리를 정리하면
,첫번째줄1,두번째줄1,x,1세번째줄,1,x,x(x-1)/2,x,1 로 점점 복잡해집니다.(단x는 첫번째줄이면 1,두번째줄이면 2,3번째줄이면 3으로 대입한다.)
a1=1,a2=x,a3=x(x-1)/2,...............................가되고 an은 x(x-1)(x-2)......(x-n+2)/(n-1)!이 됩니다.an의 식의 개수는 n+2, x+1)
그리고 1=2^x으로 만들어도 같습니다. 1+x+1=2^x 입니다. 당연히 계속 성립합니다.
Severity: Notice
Message: Undefined variable: tag_news_list
Filename: inc/article_view.php
Line Number: 90
Backtrace:
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/article_view.php
Line: 90
Function: _error_handler
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Article.php
Line: 221
Function: view
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once
Severity: Warning
Message: count(): Parameter must be an array or an object that implements Countable
Filename: inc/article_view.php
Line Number: 90
Backtrace:
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/article_view.php
Line: 90
Function: _error_handler
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Article.php
Line: 221
Function: view
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once
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