Solutions

Get detailed explanations to advanced GMAT questions.



Question

If x ≠ – 1, then  is equal to


 

Option A:

-1

Option B:

1

Option C:

x

Option D:

1-x

Option E:

x-1

Difficulty Level

Medium

Solution

Option D is the correct answer.


Option Analysis

We can use a2 – b 2 = (a+b)(a-b)

So in the given expression, only (1-x) is left in the numerator all the other will get cancel with denominator.