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The first and last terms of an A.P. are ...

The first and last terms of an A.P. are 1 and 7 . If
the sum of its terms is 36 , then the number of
terms will be

A

6

B

7

C

8

D

9

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AAKASH INSTITUTE-SEQUENCES AND SERIES -Assignment (SECTION - A) One option is correct
  1. If 8^(th) of an A.P. is 15 , then the sun of first 15 terms is

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  2. If a(1),a(2),a(3),………. are in A.P. such that a(1) + a(5) + a(10) + a(1...

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  3. The first and last terms of an A.P. are 1 and 7 . If the sum of its...

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  4. If the sum of n terms of an A.P., is 3n^2+5n then which of its terms i...

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  5. In an A.P., if common difference is 2, sum to n terms is 49, 7th term ...

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  6. The sum of all 2 digit odd numbers is

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  7. The sum of all 2 digit odd numbers is

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  8. The number of numbers lying between 81 and 1792 which are divisible by...

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  9. Three number are in A.P. such that their sum is 24 and sum of thei...

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  10. If four numbers in A.P. are such that their sum is 50 and the great...

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  11. If the sum of p terms of an A.P. is q and the sum of q terms is p, the...

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  12. If (3+5+7+ u p tont e r m s)/(5+8+113 u p to10t e r m s)=7, then find...

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  13. How many terms of the series 54,51, 48,.. be taken so that their sum i...

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  14. There are n A.M.s between 3 and 17. The ratio of the last mean to the ...

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  15. n A.M.\'s are inserted between 1 and 31 such that the ratio of the 7th...

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  16. Four numbers are in arithmetic progression.The sum of first and last t...

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  17. If the sum of three numbers which are in A.P is 27 and the product of ...

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  18. If n arithmetic means are inserted between 2 and 38, then the sum of t...

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  19. If S(n) denote the sum to n terms of an A.P. whose first term is a ...

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  20. If three positive numbers a, b, c are in A.P. and 1/a^2,1/b^2,1/c^2 a...

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