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17 Apr 2018, 01:23
Kudos
Bookmarks
C
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Difficulty:
25%
(medium)
Question Stats:
69% (00:48) correct
31%
(00:53)
wrong
based on 1030
sessions
History
Date
Time
Result
Not Attempted Yet
What is the range of the solutions to the equation |x^2 – 1| = 0 ?
A. 0
B. 1
C. 2
D. 3
E. 5
A. 0
B. 1
C. 2
D. 3
E. 5
19 Apr 2018, 17:58
Kudos
Bookmarks
Bunuel
The only way |x^2 – 1| = 0 is if x^2 - 1 = 0. Let’s solve it:
x^2 - 1 = 0
(x - 1)(x + 1) = 0
x = 1 or x = -1
Thus, the range is 1 - (-1) = 2.
Answer: C
General Discussion
