Question

Suppose that the function F is defined for all real numbers r by the formula F(r)=2(r-1)+3. Evaluate F at the input value F(2)

Answer 1

In each case, we substitute the given input value for r into the formula for f:

f(0)=2(0−1)+3=−2+3=1

f(2)=2(2−1)+2=2+3=5

f(x+2)=2(x+2−1)+3=2x+5

f(f(2))=f(5)=2(5−1)+3=11.