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Find the sum of n terms of the series 7+...

Find the sum of n terms of the series `7+77+777+`..........

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MAXIMUM PUBLICATION-SEQUENCE AND SERIES-EXAMPLE
  1. Find the sum of the first 10 terms of a GP, whose 3^rdterm is 12 and 8...

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  2. Find the 5^th term of the sequence whose n^th terman=(n^2-5)/4

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  3. Find the sum of n terms of the series 7+77+777+..........

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  4. Find the sum to n terms of the series. 1xx2+2xx3+3xx4+4xx5+............

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  5. Find the sum of multiple of 7 between 200 and 400.

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  6. The sum of first 3 terms of a GP is 39/10and their product Is 1. Find ...

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  7. If 'a' is the first term and 'd is the common difference of an AP, the...

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  8. In an AP, if the m^th term is 'n' and the n^th term is 'm', prove tha...

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  9. Find the sum to n terms of the series. 1xx2+2xx3+3xx4+4xx5+............

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  10. If the sum of certain number of terms of the AP 25,22,19,........is 11...

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  11. Find the sum to n terms of the series 1xx2xx3+2xx3xx4+3xx4xx5+.........

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  12. The 3^rd term of the sequence whose n^th term is (3/2)^(n+1)…………….

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  13. Insert three numbers between 1 and 256 so that the resulting sequence ...

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  14. If p^th term of an AP is 'q' and q^th term is 'p', where p ne q find r...

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  15. Geometric mean of 16 and 4 is …………..

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  16. Find the sum to n terms of the series: 5+55+555+………..

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  17. Find the sum of n terms of the AP, whose K^th term is ak=5K+1.

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  18. If the first three terms of an AP is x-1,x+1,2x+3, then x is……….

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  19. Find the sum to n terms of the series. 1xx2+2xx3+3xx4+4xx5+............

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  20. The nth term of the GP 5,-5/2,5/4,-5/8……………. is 5/(1024). Find 'n'.

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