Given the following function find f(-2)

f(-2) = 1

Step-by-step explanation:

Simply plug in -2 for x in our given function:

f(-2) = (-2 - 3)/(2(-2) - 1)

f(-2) = -5/(-4 - 1)

f(-2) = -5/(-5)

f(-2) = 1

1

Step-by-step explanation:

Plug x as -2 and solve.

(-2 - 3)/(2(-2) - 1)

-5/(-4 - 1)

-5/-5

= 1

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation: