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x^(3m)+x^(3n-1)+x^(3r-2) where m,n,r in ...

`x^(3m)+x^(3n-1)+x^(3r-2)` where m,n,r in N` is divisible by

A

`x^2-x+1`

B

`x^2+x+1`

C

`x^2+x-1`

D

`x^2-x-1`

Text Solution

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The correct Answer is:
B
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