Question

Evaluate the function fx = 4 * 7^t for x= -1 and x=2

Answer 1

Well what i think you're asking here...I apologie if I'm wrong but what I did was 

f(-1) = 4 * 7^t = 4/7 

and 

f(2) = 4 * 7^t = 196.

Is this what you wanted if not I can...try another way.