Question

Evaluate the function f(x) = x 2 + 1 for f(2). 1 5 7

Answer 1

If you get a function like f(2), you have to know that the 2 in the brackets/parentheses pretty much replaces the “x” in the equation. Think about it:

If we have f(x) and f(2), that must mean x=2

So we insert the value of x into the function and we get:

f(2)= 2*2+1=4+1=5

So 5 is the answer