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Find the sums of the indicated number of...

Find the sums of the indicated number of terms of the following geometric progressions :
`x^2-y^2,x-y, (x-y)/(x+y)`, ...., n terms `(x+y ne 1)`.

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MODERN PUBLICATION-SEQUENCES AND SERIES-EXERCISE
  1. Find the sum to indicated number of terms of the geometric progression...

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  2. Find the sum to indicated number of terms of the geometric progression...

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  3. Find the sums of the indicated number of terms of the following geomet...

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  4. How many terms of G.P. 3, 3^2, 3^3, ... are needed to give the sum 120...

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  5. How many terms of a G.P. 3,3/2,3/4,......... are needed to give the su...

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  6. Determine the number n of terms of the G.P. 3,6,12, .......... so that...

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  7. Given a G.P. with a= 1,r= sqrt2. Find S20.

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  8. Given a G.P. with a= 729 and 7th term 64, determine S7.

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  9. If {an} is a G.P. and a1=4,r=5, find a6 and S6.

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  10. Find a G.P. for which sum of the first two terms is -4 and the fifth t...

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  11. The sum of first three terms of a G.P. is 16 and the sum of the next t...

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  12. The sum of some terms of GP. is 315 whose first term and the common ra...

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  13. Find the sum to.n terms of the following series 5+ 55 + 555+………..

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  14. Sum to n terms: 9+ 99 + 999 + ......

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  15. Sum to n terms: 3 + 33+ 333 +..........

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  16. Find the sum of the sequence 7, 77, 777, 7777,.....up to n terms.

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  17. Sum to n terms: 8 + 88 + 888+..........

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  18. The sum of first 20 terms of the sequence 0.7,0.77,0.777,"……" is

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  19. Find the sum to n terms 0.6 + 0.66 + 0.666 + ………..

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  20. Sum to n terms: 0.3+ 0.33 +0.333 +.......

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