Posted by Mat on Monday, May 20, 2013 at 10:14pm.
Find the derivative of the following function f(x)=(x3/2x+3)^2

Calculus  Steve, Tuesday, May 21, 2013 at 11:42am
Assuming the usual carelessness with parentheses, I gather you mean
f(x) = ((x3)/(2x+3))^2
If f = u^2, f' = 2u u'
So, f' = 2(x3)/(2x+3) * ((x3)/(2x+3))'
= 2(x3)/(2x+3) * [(2x+3)2(x3)/(2x+3)^2]
= 2(x3)/(2x+3)*(9/(2x+3)^2)
= 18(x3)/(2x+3)^3
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