SOLUTION: If f(x) = 7^x, then what does f(x+3)-f(x+1) equal?

Algebra ->  Functions -> SOLUTION: If f(x) = 7^x, then what does f(x+3)-f(x+1) equal?      Log On


   

Question 1148137: If f(x) = 7^x, then what does f(x+3)-f(x+1) equal?
Answer by ikleyn(52787) About Me  (Show Source):
You can put this solution on YOUR website!
.

it is equal to  7%5E%28x%2B3%29 - 7%5E%28x%2B1%29 = 7%5E3%2A7%5Ex+-+7%2A7%5Ex = %287%5E3-7%29%2A7%5Ex = 7%2A%287%5E2-1%29%2A7%5Ex = 7%2A48%2A7%5Ex = 336%2A7%5Ex.    ANSWER