Question

Evaluate the function f(x) = 4•7^x
(for x = -1 & x = 2) show your work.
In dire need of help w/ this one!

Answer 1

For x = -1

$f(-1)=4\times 7^{-1}=4\times \dfrac{1}{7^{1}}=\dfrac{4}{7}$

For x = 2

$f(2)=4\times 7^{2}=4\times (7\times 7)=4\times 49=196$