Posted by **Alaina** on Saturday, May 4, 2013 at 7:08pm.

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 ^

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