Chapter 8.CR, Problem 18CR

To determine

a.

To find:

The possible inputs x if $f(x)=4x-5;f(x)=15$

To determine

b.

To find:

The possible inputs x if $f(x)=x^2-1;f(x)=2$

To determine

c.

To find:

The possible inputs x if $f(x)=\frac{x+1}{x+2};f(x)=-1$

To determine

d.

To find:

The possible inputs x if $f(x)=\frac{x+1}{x+2};f(x)=1$