Question

Example 1: If f(x) = x* - 2x + 7, find f(0) + f(2).​

Answer 1

We rewrite 2x+7to be an expression in terms of

x+1:

2x+7=2x +2+5

, 2(x+1)+5

Then:

f(x+1)=2(x+1)+5

so

f(x)=2x+5

meaning

f(0)=2(0)+5

f(0)=0+5

f(0)=5