Solve for f: gradf = (2xy + sin(x)i + (x2 + 2)j

[-EquinoX-]

Homework Statement

Let gradf = (2xy + sin(x)i + (x2 + 2)j.
Find f.

Homework Equations

The Attempt at a Solution

http://img7.imageshack.us/img7/6303/ansh.th.jpg

why is my answer wrong?

 

[dx]

If \nabla f = (2xy + \sin x)\bold{i} + (x^2 + 2)\bold{j}, your answer is correct.

 

[-EquinoX-]

but then why webassign say it's wrong...

 

[dx]

I checked again and It still looks right to me. Maybe you read the question wrong, or entered it wrong.

 

[-EquinoX-]

pretty sure it's not wrong... hmmm

 

[-EquinoX-]

okay.. I think the answer is right, it's just the way I format the answer in webassign and it doesn't accepts it.. also if I am asked:

Find the exact change in f between (0, 0) and (1, π/2).

do I just plug the numbers in?