Question

F(n)=(n-1)^2+3n, which statement is true?

1) f(3)=-2
2) f(-2)=3
3) f(-2)=-15
4) f(-15)=-2

Answer 1

2)
`f(-2)=3`

Explanation:

`f(3)=(3-1)^2+3(3)=13 \\ \\ f(-2)=(-2-1)^2+3(-2)=3 \\ \\ f(-15)=(-15-1)^2+3(-15)=211`