+0

0
96
2

1. There are three real numbers $x$ that are not in the domain of $$f(x) = \frac{1}{1+\frac{1}{1+\frac 1x}}.$$ What is the sum of those three numbers?

2.Let $f(x) = \frac{3x - 7}{x + 1}.$ Find the domain of $f$. Give your answer as an interval.

Guest Mar 14, 2018
#1
+87602
+1

First one

0 is not in the domain

-1 is not in the domain

-1/2 is not in the domain

The sum of these   is   -3/2

CPhill  Mar 14, 2018
#2
+87602
+1

$$\frac{3x - 7}{x + 1}$$

The domain  will include all real numbers except x  =  -1

So.....

(-inf, -1)   U  (-1, inf )

CPhill  Mar 14, 2018