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If the sum of the first 14 terms of an A...

If the sum of the first 14 terms of an AP is 1050 and its first term is 10, find the `20^(t h)` term.

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The correct Answer is:
`a_(20) = a+19d = 10+190 = 200`
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CBSE COMPLEMENTARY MATERIAL-ARITHMETIC PROGRESSION -SHORT ANSWER TYPE QUESTIONS-II
  1. Find the middle term(s) of the A.P. 7,\ 13 ,\ 19 ,\ ddot,\ 241 .

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  2. Find the sum of integers between 10 and 500 which are divisible by 7

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  3. The sum of 5th and 9th term of an A.P. is 72 and the sum of 7th and...

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  4. If the mth term of an A.P. be 1//n and nth term be 1//m then show that...

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  5. If the p^(t h) term of an A.P. is q and the q^(t h) term is p , prove ...

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  6. Find the number of natural numbers between 101 and 999 which are di...

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  7. The sum of 5th and 9th terms of an A.P. is 30. If its 25th term is thr...

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  8. If sn , the sum of first n terms of an A.P., is given by Sn=5n^2+3n , ...

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  9. Which term of the AP 3, 15, 27, 39,… will be 120 more than its 21st te...

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  10. If S(n) the sum of first n terms of an A.P. is given by Sn = 3n^(2) ...

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  11. In a flower bed, there are 23 rose plants in the first row, 21 in the ...

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  12. For what value of n, are the with terms of two APs: 63, 65, 67, . . . ...

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  13. Which term of the A.P. 3,\ 15 ,\ 27 ,\ 39 ,\ will be 132 more t...

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  14. If the sum of the first 14 terms of an AP is 1050 and its first term ...

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  15. Find the sum of the odd numbers between 0 and 50.

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  16. If Sn = 4n^(2) - n^(2) in an A.P. find the A.P.

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  17. How many terms of the AP: 9, 17, 25, . . . must be taken to give a sum...

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