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18 Mar 2023, 12:45
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C
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Difficulty:
15%
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Question Stats:
86% (01:43) correct
14%
(01:56)
wrong
based on 260
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If x = -1 and n is the sum of all prime numbers less than 100, what is the value of \(x^n+x^{n+1}+x^{n+2}+x^{n+3}+x^{n+4}+x^{n+5}\)?
A. -2
B. -1
C. 0
D. 1
E. 2
A. -2
B. -1
C. 0
D. 1
E. 2
19 Mar 2023, 10:29
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N is sum of Prime number less than 100, less than 100 we have 25 Prime numbers and those sum is
N is 1060 it means A even number
Put +1 and -1 alternately and do calulationa
Ans is C Means 0
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N is 1060 it means A even number
Put +1 and -1 alternately and do calulationa
Ans is C Means 0
Posted from my mobile device
19 Mar 2023, 10:46
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whatever the sum is it will be even only
now substituing even value of n
we will get
(-1)^even + (-1)^odd.......(-1)^even+(-1)^odd
=0
option c correct
now substituing even value of n
we will get
(-1)^even + (-1)^odd.......(-1)^even+(-1)^odd
=0
option c correct
