Question

use the following function rule to find $f(1)$.
$f(x) = 5(8)^x + 9$
$f(1) = \square$

Explanation:

Step1: Substitute x=1 into function

$f(1) = 5(8)^1 + 9$

Step2: Simplify exponential term

$8^1 = 8$, so $f(1) = 5\times8 + 9$

Step3: Calculate multiplication then addition

$5\times8=40$, so $f(1)=40+9$

Answer:

49