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For each n in N, 3.(5^(2n+1))+2^(3n+1) i...

For each `n in N, 3.(5^(2n+1))+2^(3n+1)` is divisible by

A

17

B

19

C

21

D

23

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The correct Answer is:
A
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AAKASH INSTITUTE-PRINCIPLE OF MATHEMATICAL -Section-B((Objective Type Questions (One option is correct))
  1. if P(n) be the statement 10n+3 is a prime number", then prove that P(1...

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  2. x^(n)+y^(n) is divisible by (x+y) is true when n(in N) is of the form ...

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  3. The statement 2^(n) ge n^(2) (where n in N) is true for

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  4. Choose the statement which is correct for all n in N

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  5. n(n+1)(n+2) is divisible by k for AA n in N. The largest k is

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  6. Mathematical induction is a tool or technique which is use to prove a ...

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  7. For each n in N, 3^(2n)-1 is divisible by

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  8. For each n in N, n(n+1) (2n+1) is divisible by

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  9. The statement n! gt 2^(n-1), n in N is true for

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  10. For each n in N, 3.(5^(2n+1))+2^(3n+1) is divisible by

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  11. 3.6+6.9+9.12+....+3n(3n+3)=

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  12. Choose the proposition among the following that is not true for all n ...

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  13. prove that 7 + 77 + 777 +...... + 777.........(n-digits) 7 = 7/81 (10...

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  14. Choose the propostion among the following, that is not true for n=1 bu...

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  15. Find the value of 1 xx 1!+2 xx 2!+3 xx 3!+........+n xx n!

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  16. Choose the proposition that is not true for n gt 1 (n in N).

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  17. Which of the following is true for n in N?

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  18. For all n( gt 1) in N, by using mathematical induction or otherwise 1+...

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  19. The sum of the square of three consecutive odd number increased by 1 i...

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  20. Choose the propagation among the following that is true for all n in N

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