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If n^(th) term of an A.P. is (2n + 1), w...

If `n^(th)` term of an A.P. is (2n + 1), what is the sum of its first three terms ?

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OSWAL PUBLICATION-ARITHMETIC PROGRESSIONS -SELF ASSESSMENT-2
  1. The sun of first 16 terms of the AP 10, 6, 2, … is

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  2. Find the sum of first 8 multiples of 3

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  3. If n^(th) term of an A.P. is (2n + 1), what is the sum of its first t...

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  4. If the sum of first k terms of an A.P. is 3k^2-k and its common diffe...

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  5. If the n^(th) term of an A.P. is 7-3n, find the sum of twenty five t...

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  6. The first and the last terms of an A.P. are 5 and 45 respectively. If ...

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  7. If the sum of the first 9 terms of an A.P. is 81 and that of the firs...

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  8. Find the sum of all two digit natural numbers which are divisible by ...

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  9. Find the sum of the integers between 100 and 200 that are divisible by...

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  10. Find the sum of all odd numbers lying between 100 and 200.

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  11. If the sum of first 14 terms of an A.P. is 1050 and its first term is ...

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  12. The sum of four consecutive numbers in an A.P. is 52 and the ratio of...

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  13. Find the 60^(th) term of the A.P. 8, 10, 12, ....., if it has a total...

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  14. Sarika has a daughter Sita. Sarika wanted to save the money for her fu...

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  15. Sarika has a daughter Sita. Sarika wanted to save the money for her fu...

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  16. Sarika has a daughter Sita. Sarika wanted to save the money for her fu...

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  17. Sarika has a daughter Sita. Sarika wanted to save the money for her fu...

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  18. Ramkali would need Rs. 1800 for admission fee and books etc., for her ...

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  19. A ladder has rungs 25 cm apart, (see Figure). The rungs decrease unif...

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  20. A ladder has rungs 25 cm apart, (see Figure). The rungs decrease unif...

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