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Apr 2808:00 AM PDT
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26 May 2023, 04:30
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
78% (01:50) correct
22%
(01:54)
wrong
based on 157
sessions
History
Date
Time
Result
Not Attempted Yet
\(n\) is an integer. What is the units digit of \(n^5-5n^3+4n\)?
A. 0
B. 2
C. 4
D. 6
E. 8
A. 0
B. 2
C. 4
D. 6
E. 8
26 May 2023, 04:42
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If we put n=1 then , 1-5+4 = 0,
now put n=2 , 2^5 - 5*2^3 + 4*2 = 40-40 = 0
so if we put any value the unit digit will always be zero,
[A]is the answer.
now put n=2 , 2^5 - 5*2^3 + 4*2 = 40-40 = 0
so if we put any value the unit digit will always be zero,
[A]is the answer.
27 May 2023, 00:30
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A. 0
B. 2
C. 4
D. 6
E. 8
Very nice question!!!
B. 2
C. 4
D. 6
E. 8
Very nice question!!!
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