Question

whats first order partial derivative of f(x,y)=7x-10y^2-9

Answer 1

Partial derivative with respect to x or y?

Answer 2

with respect to x

Answer 3

Partial derivative with respect to x would give you 7 and
Partial derivative with respect to y would give you -20y

Answer 4

when taking a partial derivative you count every other variable as a constant and is therefore dropped off in the derivative.

Answer 5

ok thanks a lot i have 1 more

Answer 6

f(x,y,z) =x^2y+y^2z+xz^2

Answer 7

x^2 + 2yz