Question

Let fx=x*+x, then write f(y+1)

Answer 1

Answer:

$\begin{gathered}f(x) = {x}^{2} + x \\ f(y + 1) = ({y + 1})^{2} + y + 1 \\ {y}^{2} + 1 + 2y + y + 1 = {y}^{2} + 3y + 2 \: ans\end{gathered}$

hope it will help you