Question

How do you evaluate the function `f (x) = 4 • 7^x` for x = -1 and x = 2?

Answer 1

See details below

Explanation:

Given `f(x)=4·7^x`

For `x=-1` we have `f(-1)=4·7^(-1)=4/7` using `a^(-n)=1/a^n`

For x=2, we have `f(2)=4·7^2=196`