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Backtrace:

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Function: _error_handler

File: /var/www/html/KOL/voice/application/controllers/Exitpage.php
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File: /var/www/html/KOL/voice/public/index.php
Line: 319
Function: require_once

A PHP Error was encountered

Severity: Notice

Message: Trying to access array offset on value of type null

Filename: models/Site_model.php

Line Number: 233

Backtrace:

File: /var/www/html/KOL/voice/application/models/Site_model.php
Line: 233
Function: _error_handler

File: /var/www/html/KOL/voice/application/controllers/Exitpage.php
Line: 110
Function: get_keyword_cat

File: /var/www/html/KOL/voice/public/index.php
Line: 319
Function: require_once

疑難雜症萬事通 - 臨界點不存在 - 前往 https://ocw.nthu.edu.tw/ocw/upload/7/news/L17_critical point(臨界點) First derivative test(一階導函數測試) Second derivative test(二階導函數測試) 4.6 Concavity and points of inflection(圖形凹性和反曲點) Concave up and concave down.pdf
疑難雜症萬事通
在網路上遇到任何問題都可以在這邊找找看唷

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您即將離開本站

並前往 https://ocw.nthu.edu.tw/ocw/upload/7/news/L17_critical%20point(%E8%87%A8%E7%95%8C%E9%BB%9E)%20First%20derivative%20test(%E4%B8%80%E9%9A%8E%E5%B0%8E%E5%87%BD%E6%95%B8%E6%B8%AC%E8%A9%A6)%20Second%20derivative%20test(%E4%BA%8C%E9%9A%8E%E5%B0%8E%E5%87%BD%E6%95%B8%E6%B8%AC%E8%A9%A6)%204.6%20Concavity%20and%20points%20of%20inflection(%E5%9C%96%E5%BD%A2%E5%87%B9%E6%80%A7%E5%92%8C%E5%8F%8D%E6%9B%B2%E9%BB%9E)%20Concave%20up%20and%20concave%20down.pdf

是否確定要離開？