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24 Nov 2023, 10:07
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
60% (01:42) correct
40%
(01:45)
wrong
based on 50
sessions
History
Date
Time
Result
Not Attempted Yet
What is the value of \(\frac{x^{n^2 - n + 2}}{x^{(n - 2)(n + 1)}}\)?
(1) n = 5
(2) x = 2
(1) n = 5
(2) x = 2
24 Nov 2023, 10:30
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What is the value of \(\frac{x^{n^2 - n + 2}}{x^{(n - 2)(n + 1)}}\)?
(1) n = 5
Value of x has to be a known value, else the value of \(\frac{x^{n^2 - n + 2}}{x^{(n - 2)(n + 1)}}\) can't be known.
INSUFFICIENT.
(2) x = 2
Value of n is not known so there will many values as one may think. However, checking with two different values of n will help us know because if we get only one value for the term \(\frac{x^{n^2 - n + 2}}{x^{(n - 2)(n + 1)}}\) then this statement is sufficient.
E.g. n = 2, value is 16
n = 1, value is 16
SUFFICIENT.
Answer B.
(1) n = 5
Value of x has to be a known value, else the value of \(\frac{x^{n^2 - n + 2}}{x^{(n - 2)(n + 1)}}\) can't be known.
INSUFFICIENT.
(2) x = 2
Value of n is not known so there will many values as one may think. However, checking with two different values of n will help us know because if we get only one value for the term \(\frac{x^{n^2 - n + 2}}{x^{(n - 2)(n + 1)}}\) then this statement is sufficient.
E.g. n = 2, value is 16
n = 1, value is 16
SUFFICIENT.
Answer B.
25 Nov 2023, 00:18
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Bunuel
OA is B
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