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Elementary and Intermediate Algebra
Mark Dugopolski, Southeastern Louisiana University
Functions
Inverse Functions

Warm-Ups



1

The inverse of {(1, 3), (2, 5)} is {(3, 1), (2, 5)}.
A)TRUE
B)FALSE
2

The function f (x) = 3 is a one-to-one function.
A)TRUE
B)FALSE
3

If g(x) = 2x, then g-1(x) = 1/(2x).
A)TRUE
B)FALSE
4

Only one-to-one functions are invertible.
A)TRUE
B)FALSE
5

The domain of g is the same as the range of g-1.
A)TRUE
B)FALSE
6

The function f (x) = x4 is invertible.
A)TRUE
B)FALSE
7

If f (x) = -x, then f-1(x) = -x.
A)TRUE
B)FALSE
8

If h is invertible and h(7) = -95, then h-1(-95) = 7.
A)TRUE
B)FALSE
9

If k(x) = 3x - 6, then k-1(x) = 1/3x + 2.
A)TRUE
B)FALSE
10

If f (x) = 3x - 4, then f-1(x) = x + 4.
A)TRUE
B)FALSE








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