If 50% is 30 what is 25%

I'm so close to finishing all these.

Proceed as in example 3 in section 6.1 to rewrite the given expression using a single power series whose general term involves xk. ∞ n(n − 1)cnxn − 2 n = 2 − 4 ∞ ncnxn n = 1 + ∞ cnxn n = 0

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)