What are the excluded values of x for (x+1)/(x^2-1) A. x = –1, x = 0, x = 1 B. x = –1, x = 0 C. x = 0, x = 1 D. x = –1, x = 1

asked Jan 22, 2018 39.9k views

4 votes

What are the excluded values of x for
(x+1)/(x^2-1)

A. x = –1, x = 0, x = 1
B. x = –1, x = 0
C. x = 0, x = 1
D. x = –1, x = 1

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3 votes

The answer would be D. x=-1, x=1

Tumas answered Jan 23, 2018

by Tumas

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5 votes

Denominator:

$x^2-1=(x+1)(x-1)=\big(x-(-1)\big)(x-1)$

so excluded values are x = -1 and x = 1.

Answer D.

Pandemonium answered Jan 28, 2018

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