18.01SC Single Variable Calculus:
Problem Set 1.
Question 1F-7c:
The result I got was
(-3mgr) / ( (1+r^2)^(7/4) )
but the solutions say it is
(-3mgr) / ( (1+r^2)^(5/2) )
Can anyone explain to me what I did wrong?
I used both the chain rule and the quotient rule, and after doing it, I got this:
[ - mg * ( (3/2) * (1 + r^2)^(1/2) * 2r ) ] / ( (1 + r^2)^(9/4) )

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