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The sum of some terms of G.P. is 315 who...

The sum of some terms of G.P. is 315 whose first term and the common ratio are 5 and 2, respectively. Find the last term and the number of terms.

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The correct Answer is:
160;6
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NCERT TELUGU-SEQUENCES AND SERIES-Miscellaneous Exercise On Chapter 9
  1. Find the sum of all two digit numbers which when divided by 4, yields ...

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  2. If f is a function satisfying f (x +y) = f(x) f(y) for all x, y in N ...

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  3. The sum of some terms of G.P. is 315 whose first term and the common r...

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  4. The first term of a G.P. is 1. The sum of the third term and fifth ter...

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  5. The sum of three numbers in G.P. is 56. If we subtract 1, 7, 21 from t...

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  6. A G.P. consists of an even number of terms. If the sum of all the term...

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  7. The sum of the first four terms of an A.P. is 56. The sum of the last ...

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  8. If (a + bx)/(a - bx) = (b + cx)/(b - cx) = (c + dx)/(c - dx)( x ne 0),...

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  9. Find the 5th term of the sequence 1,sqrt2, 2

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  10. Find the 6th term from the end of the A.P:17,14,11,.......-40

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  11. If a ((1)/(b) + (1)/(c )), b ((1)/(c )+ (1)/(a)), c ((1)/(a) + (1)/(b)...

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  12. If a, b, c, d are in G.P, prove that (a^n + b^n), (b^n + c^n), (c^n +...

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  13. Find the product of the following pairs? -10ab^(3),-6a^(2)b

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  14. Find the product of the following pairs? 6pq,-2pq^(2)

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  15. Find the product of the following pairs? 2lm,5m

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  16. Find the sum of the following series up to n terms: (i) 5+55+555+......

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  17. Find the 20^(th) term of the series 2 xx 4 + 4 xx 6 + 6 xx 8 + ... + ...

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  18. Find the sum of the first n terms of the series: 3+ 7 +13 +21 +31 +......

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  19. If S(1), S(2),S(3), are the sums of first n natural numbers their squ...

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  20. Find the product of the following pairs? a^(2)bc,12b^(3)c

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