Need help with my homework

1. Dec 7, 2007

michaeljlyons

1. The problem statement, all variables and given/known data

calculate Δƒ/Δx and Δƒ/Δy.

ƒ(x,y) = x(y^2) + (x^2)y

any help will be appreciated

2. Dec 7, 2007

cristo

Staff Emeritus
You need to show some work before we can help you. In order to attempt the question, you first need to know what Δƒ/Δx and Δƒ/Δy are. Can you tell us?

3. Dec 7, 2007

michaeljlyons

well what i did was

Δƒ/Δx = 2*x*y + y^2
Δƒ/Δy = x^2 + 2*x*y

but iam not sure if iam doing this right

f(x,y) confuses me forgot how to deal with this

Last edited: Dec 7, 2007
4. Dec 7, 2007

Dick

It looks like you are taking partial derivatives of f(x,y) wrt to x and y. IF that's what you were trying to do, then you are in good shape.

5. Dec 7, 2007

michaeljlyons

Δƒ/Δx = 2*x*y + y^2
Δƒ/Δy = x^2 + 2*x*y

is correct right? for f(x,y)

6. Dec 7, 2007

Dick

Whether your answer is correct depends on what the question is. It's right if your delta notation is supposed to mean 'partial derivative'. It's not the usual notation.