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Find the sum of all 11 terms of an A.P. ...

Find the sum of all 11 terms of an A.P. whose middles term is 30.

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Find the sum of all the 11 terms of an AP whose middle most term is 30.

Assertion (A) : Sum of all 11 terms of an A.P whose middle most term is 30 is 330. Reason (R ) : Sum of first n terms of an A.P is given by S_(n)=(n)/(2)[a+l] , l is the middle term

Find the sum of first 31 terms of an A.P. whose nth term is (3+(2n)/(3)) .

Find the sum of first 25 terms of an A.P. whose 4th term is 13 and 22nd term is 67.

(i) If the sum of a certain number of terms of the A.P. 25,22,19,………………….. is 116, find the last term. (ii) Find the sum of 32 terms of an A.P. whose third terms is 1 and the 6th term is -11.

Find the sum of 'n' terms of an A.P. whose nth term is 2n+1.

Find the sum of n terms of an A.P. whose nth term is (2n+1).

Find the sum of first 45 terms of an A.P. whose 8^(th) term is 41 and 13^(th) term is 61 .

Find the sum of the first 25 terms of an A.P. whose nth term is given by a_(n)=7-3n

AGRAWAL PUBLICATION-ARITHMETIC PROGRESSIONS-EXAMPLE
  1. For an AP,it is given that the first term (a) = 5, common difference (...

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  2. If 6 times the 6^(th) term of an AP. Is equal to 9 times the 9^(th) te...

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  3. Find the sum of all 11 terms of an A.P. whose middles term is 30.

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  4. Find the sum first 15 multiples of 8.

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  5. Two AP's have the same common difference.The diference their between t...

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  6. Justify whether it is true to say that the following are the n^(th) te...

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  7. Justify whether it is true to say that the following are the n^(th) te...

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  8. Justify whether it is true to say that the following are the n^(th) te...

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  9. Find a, b, and c such that the following numbers in AP: a,7, b, 23, c.

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  10. Determin the AP whose 5^(th) term is 19 and the difference of 8^(th) t...

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  11. Th sum of the first 30 terms of an A.P I 1920. If the fourth term is 1...

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  12. Which term of the A.P 20, 19 1/4 , 18 1/4, 17 1/4, ….. is the first ne...

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  13. Find the middle term of the A.P 7,13,19,……,247.

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  14. Split207 into three parts uch that these are in AP and the product of ...

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  15. How many numbers lie between 10 and 300, which when divided by 4 leave...

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  16. Find the sum of the two middle most terms of the AP: -4/3, -1,-2/3, …....

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  17. Show that the sum of all terms of an A.P whose first term is a, the se...

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  18. The first term of an ap is -5 and the last term is 45. If the sum of t...

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  19. If Sndenotes the sum of first n terms of an AP, prove that S(12) = ...

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  20. If the sum of the first 6 terms of an AP is 36 and that of the fist 16...

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