differentiating with respect to....

[cabellos]

I have a question on differentiating the function z/(2x + y) with respect to x.

Is the answer -2z/(2x + y)^2 ?

Thanks:smile:

[moe_3_moe]

yes absolutely right... z and y are constant with respect to x

[TD]

The other way arround actually, if z and y are constant wrt x, then your answer (the partial derivative of the function wrt x) is right :smile:

[HallsofIvy]

If z and y are NOT "constant with respect to x", but are functions of x, then you would use the chain rule.