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If n is a positive integer, then n^(3)+2...

If `n` is a positive integer, then `n^(3)+2n` is divisible

A

2

B

3

C

6

D

12

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The correct Answer is:
B
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HIMALAYA PUBLICATION-MATHEMATICAL INDUCTION AND SUMMATION OF SERIES-Question Bank
  1. Product of 4 consecutive natural numbers is divisible by

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  2. 49^(n)+16 n-1 is divisible by

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  3. If n is a positive integer, then n^(3)+2n is divisible

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  4. If n in N then 3 . 5^(2 n+1)+2^(3 n+1) is divisible by

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  5. If n is a +ve integer, 4^(n)-3 n-1 is divisible by

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  6. The greatest positive integer, which divides (n+1)(n+2)(n+3)(n+4) for ...

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  7. The sum to n terms of the series (1)/(sqrt(1)+sqrt(3))+(1)/(sqrt(3)+...

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  8. The sum of n terms of the series (3)/(1^(2))+(5)/(1^(2)+2^(2))+ (7)/(1...

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  9. If n is odd then the sum of n terms of the series 1^(2)-2^(2)+3^(2)-...

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  10. If log a+log (a^(2)/b)+log (a^(3)/b^(2))+.. .. n terms =(n)/(2)(P log ...

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  11. For a natural number n which one is the correct statement?

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  12. Sum of the series 1+(3^(2))/(2 !)+(3^(4))/(4 !)+(3^(6))/(6 !)+.. . . t...

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  13. 1+(1+2)/(2)+(1+2+3)/(3) +(1+2+3+4)/(4)+.. . to n terms =

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  14. The sum of n terms of the series 1^(2)-2^(2)+3^(2)-4^(2)+5^(2)-6^(2)...

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  15. Sum of the series S=1^(2)-2^(2)+3^(2)-4^(2)+.. ..-(2002)^(2)+(2003)^...

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  16. If S(n)=(1)/(6) n(n+1)(n+2) is the sum to n terms of a series whose n...

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  17. If S(n)=(1)/(6) n(n+1)(n+2) is the sum to n terms of a series whose n...

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  18. If S(n)=(1)/(6) n(n+1)(n+2) is the sum to n terms of a series whose n...

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  19. Let S(n) denote the sum of the cubes of the first n natural numbers an...

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  20. If t(n) denotes the nth term of the series : 2+3+6+11+18+"………." , th...

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