# Find instantaneous rate of change of 7/3z^2

1. ### mattsoto

5
"Find the instantaneous rate of change of w with respect to z if w=(7/3z^2)"
excuse the primitive equation...any help???

2. ### iNCREDiBLE

128
Just differentiate it with respect to z.

3. ### HallsofIvy

40,811
Staff Emeritus
Is that w= (7/3)z2 or w= 7/(3z2)?

I suspect the former which should be easy to differentiate using
(zn)'= n zn-1. If the latter, write it as w= (7/3)z-2 and use the same rule.