# Calculus-Solved - Incorrect

posted by
**Alaina**
.

k(z)= 4z^4 - z(z+10)/((1+z)^2)

derivative?

16z^3 + (3z^3 + 26z^2 + 42z + 10)/((1+z)^4)

this is wrong though ^

posted by
**Alaina**
.

k(z)= 4z^4 - z(z+10)/((1+z)^2)

derivative?

16z^3 + (3z^3 + 26z^2 + 42z + 10)/((1+z)^4)

this is wrong though ^