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## Homework Statement

Hello,

I know this might be trivial but,

can you please tell me what I am missing?

Here is my problem :

## Homework Equations

Given F = (yi+x

^{3}j).dr

Q = x

^{3}

P = y

=> ∂Q/∂x = 3x

^{2}and ∂P/dy = 1

∫

_{c}(3x

^{2}-1).dr = ∫

^{2Pi}

_{0}∫

^{1}

_{0}(3r

^{2}cosθ

^{2}-1) rdrdθ

∫

^{2Pi}

_{0}∫

^{1}

_{0}(3r

^{3}cosθ

^{2}-r) drdθ

Is it true so far ?

Thanks

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