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Find the sum of the first 15 terms of each of the following sequences having `n t h` term as `(i) x_n=6-n` `(ii) y_n=9-5n`

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RD SHARMA ENGLISH-ARITHMETIC PROGRESSIONS-All Questions
  1. Find the sum: 25+28+31+\ dot\ +100 (ii) 18+15 1/2+13+\ dot+\ (-49 ...

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  2. Find the sum of the first 15 terms of each of the following sequence...

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  3. Find the sum of the first 15 terms of each of the following sequence...

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  4. Find the sum of firsts 20 terms of the sequence whose n t h term is...

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  5. Find the sum of the first 25 terms of an A.P. whose n t h term is ...

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  6. Find the sum of the first 25 terms of an A.P. whose n t h term is ...

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  7. Find the sum of first 51 terms of an AP whose second and third terms ...

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  8. If the sum of 7 terms of an A.P. is 49 and that of 17 terms is 289,...

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  9. In an A.P. first term is 5, last term is 45 and sum = 400 . Find the n...

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  10. In an A.P., the sum of first n terms is (3n^2)/2+(13)/2n . Find its...

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  11. Let there be an A.P. with first term ' a ' , common difference '...

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  12. Let there be an A.P. with first term ' a ' , common difference '...

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  13. Let there be an A.P. with first term ' a ' , common difference '...

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  14. Let there be an A.P. with first term ' a ' , common difference '...

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  15. Let there be an A.P. with first term ' a ' , common difference '...

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  16. Let there be an A.P. with first term ' a ' , common difference '...

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  17. A man saved Rs. 16500 in ten years. In each year after the first he sa...

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  18. A man saves Rs. 32 during the first year, Rs. 36 in the second year an...

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  19. A man arranges to pay a debt of Rs 3600 in 40 monthly installments whi...

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  20. There are 25 trees at equal distances of 5 metres in a line with a wel...

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