# Proving stokes theorem

## Homework Statement

for the vector field E=x(xy)-y(x^2 +2y^2)
find E.dl along the contour
find (nabla)xE along the surface x=0 and x=1 y=0 and y=1

## The Attempt at a Solution

i tried the second question (nabla)xE over the surface by finding the determinant of the matrix as -2x-x=-3x so (nabla)xE=-3x and integrating along the surface x and y i found the answer to be -3/2 but the answer is meant to be -1 for both cases in order to prove stokes thm

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vela
Staff Emeritus
Homework Helper
For that vector field and contour, -3/2 is the correct answer.

ok thanks i guess the text book answers are wrong