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Mathematics 7 Online
OpenStudy (studygurl14):

calculus @dan815 @zepdrix @mathmale

OpenStudy (studygurl14):

@zepdrix

zepdrix (zepdrix):

Do you see the derivative of ln(r) somewhere else in the integral? :)

OpenStudy (studygurl14):

Oh! Should I do u-substitution, u = ln r, du/dx = 1/r ?

OpenStudy (studygurl14):

du/dr I mean

zepdrix (zepdrix):

yes

OpenStudy (studygurl14):

Thank you!

OpenStudy (studygurl14):

I got 2/3

zepdrix (zepdrix):

Oh I have to check it? XD haha ok one sec

zepdrix (zepdrix):

yay good job \c:/

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