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OpenStudy (anonymous):
Integrals and U-Substitution, I knew how to perform u substitution but I kinda forgot it with time so if it's easy for you to remind me this step I would be greatful http://screencast.com/t/Iy1Zr4czNJUZ
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hartnn (hartnn):
what exactly did u not understand ? u= x^2 differentiating both sides, du/dx = 2x du = 2x dx
OpenStudy (anonymous):
Thanks ! Yea pretty simple yet again I totally forgot it !
hartnn (hartnn):
welcome ^_^
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