Question

If f(x)=3^ x-4 what is f(- 1) ?

Answer 1

Explanation:

substitute (-1)

`{3}^(x) - 4 \\ {3}^( - 1) - 4 = (1)/(3) - 4 = - (11)/(3) = - 3.667`

Answer 2

1/243

Explanation:

When you see this notation, it means plug in -1 for x in the function.

f(-1) = 3^((-1)-4)

f(-1) = 3^-5

f(-1) = 1/3^5

f(-1) = 1/243