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Insert two numbers between 3 and 81 so t...

Insert two numbers between 3 and 81 so that the resulting sequence is G.P.

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MODERN PUBLICATION-SEQUENCES AND SERIES-EXERCISE
  1. Dipesh writes letters to four of his friends. He asks each of them to ...

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  2. A machine is depreciated at the rate of 10 % yearly and the ultimate s...

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  3. Insert two numbers between 3 and 81 so that the resulting sequence is ...

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  4. Insert 4 geometric means between 6 and 192.

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  5. The A.M. between two numbers is 20 and their G.M. is 16. Find the numb...

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  6. a, b, c are in G.P. and x and y are the A.M.’s between a, b and b, c r...

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  7. a, b, c are in G.P. and x and y are the A.M.’s between a, b and b, c r...

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  8. The sum of two numbers is 6 times their geometric mean, show that numb...

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  9. The ratio of the.A.M. and G.M. of two positive numbers a and b is m : ...

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  10. If G1 is the first of n geometric means between a and b, show that : G...

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  11. If G is the geometric mean between two distinct positive numbers a and...

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  12. If A.M. and G.M pf roots of a quadratic equation are 8 and 5 respectiv...

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  13. If one geometric mean G and two arithmetic means p amd q be inserted b...

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  14. If a is the A.M. of b and c and the two geometric means are G(1) and G...

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  15. If p ,q, r are in A.P., a is G.M. between p, q and b is G.M. between q...

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  16. Find n such that (a^n+b^n)/(a^(n-1)+b^(n-1)) may be the geometric mean...

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  17. If A and G be A.M. and G.M., respectively between two positive numbers...

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  18. If A and G are the A.M. and G.M. respectively between any two distinct...

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  19. The sum of first three terms of a G.P. is 39/10 and their product is 1...

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  20. The sum of first three terms of a GP. is 13/12 and their product is - ...

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