# Math Help - flux integral question..

1. ## flux integral question..

i need to calculate the flux of a a field going threw a cirlce on the x-y plane
when the circle point -z direction
$\int \int F ndS=\int \int F(-\frac{dz}{dx}i-\frac{dz}{dy}j-k)dA$

in this formula i my formula of the area is not z dependant

what to writhe instead of z in this formula
?

2. ## Re: flux integral question..

Can you transcribe the exact formulation of the problem?