Question

Let a{-2,-1,0,1,2} and function f is defined in a to r but t(x)=x²+1 find the range of f.

Answer 1

f(-2)=(-2)²+1=5
f(-1)=(-1)²+1=2
f(0)=0²+1=1
f(1)=1²+1=2
f(2)=2²+1=5
range={1,2,5}