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nth tern of some sequence are given belo...

nth tern of some sequence are given below. Which term can be the n th term of an AP?

A

`a_n=n(n+1)`

B

`a_n=2+5n`

C

`a_n=2^n+2`

D

`a_n=n^2+n+1`

Text Solution

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The correct Answer is:
B
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MAXIMUM PUBLICATION-SEQUENCE AND SERIES-EXAMPLE
  1. Find the sum to n terms of this series. 1/(1xx2)+1/(2xx3)+1/(3xx4)+....

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  2. Find the sum to n terms of this series. 1^2+3^2+5^2+……….

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  3. nth tern of some sequence are given below. Which term can be the n th ...

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  4. if the sum of 12^th and 22^th terms of an AP is 100. Find the sum of f...

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  5. The product of first 3 terms of a GP is 1000. If 6 terms to the second...

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  6. The product of first 3 terms of a GP is 1000. If 6 terms to the second...

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  7. Find the sum of n terms of the series 7+77+777+..........

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  8. Consider the GP 3,3^2,3^3,….. Find the sum to n terms of this GP.

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  9. Consider the GP 3,3^2,3^3,….. Find the value of n so that the sum to...

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  10. Given sum of three consecutive terms in an AP is 21 and their product ...

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  11. Given sum of three consecutive terms in an AP is 21 and their product ...

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  12. Consider the GP 3,6,12,…… Which term of this GP is 96?

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  13. Consider the GP 3,6,12,…… Find the value of n so that sum to n terms...

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  14. What is the sum of the first 'n' natural numbers?

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  15. Find the sum to 'n' terms of the series 3xx8+6xx11+9xx14+…....

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  16. If the sum of the first n terms of an Arithmetic progression is Sn=nX+...

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  17. If the sum of the first n terms of an Arithmetic progression is Sn=nX+...

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  18. If the sum of the first n terms of an Arithmetic progression is Sn=nX+...

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  19. Find the sum to n terms of the series, 2^2+ 5^2+8^2+……..

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  20. Write the first four terms of the sequence whose nth term an=n/(n+1)

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