Findf.f'(x) = √x(9 + 5x)

f(1) = 11

f= http://www.webassign.net/www31/symIm...8ba83eab26.gif http://www.webassign.net/silkicons/cross.gif

thats what I got, and obviously its wrong.. what am I doing wrong here?

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- Apr 11th 2008, 06:49 PMrsanfordlast question i promise- another antiderivative
Find

*f*.*f*'(*x*) = √*x*(9 + 5*x*)

*f*(1) = 11

*f*= http://www.webassign.net/www31/symIm...8ba83eab26.gif http://www.webassign.net/silkicons/cross.gif

thats what I got, and obviously its wrong.. what am I doing wrong here? - Apr 11th 2008, 07:28 PMSoroban
Hello, rsanford!

Quote:

Find

We have: .

Integrate: .

Since , we have: .

Therefore: .