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Backtrace:
File: /home/estarbk/public_html/dev.estar-bk.com/application/controllers/Main.php
Line: 8
Function: __construct
File: /home/estarbk/public_html/dev.estar-bk.com/index.php
Line: 315
Function: require_once
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Filename: Session/Session.php
Line Number: 137
Backtrace:
File: /home/estarbk/public_html/dev.estar-bk.com/application/controllers/Main.php
Line: 8
Function: __construct
File: /home/estarbk/public_html/dev.estar-bk.com/index.php
Line: 315
Function: require_once
Joint variation is the same as direct variation with two or more quantities. Joint variation describes a situation where one variable depends on two or more other variables and varies directly to the product of each of the other quantities.
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