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If `H` is the harmonic mean between `P and Q` then find the value of `H//P+H//Qdot`

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CENGAGE PUBLICATION-SEQUENCES AND SERIES-All Questions
  1. Find the sum of n terms of the series 1+4/5+7/(5^2)+10/5^3+......

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  2. Find the sum (1^2)/2-(3^2)/(2^2)+(5^2)/(2^3)-(7^2)/(2^4)+....oodot

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  3. If H is the harmonic mean between P and Q then find the value of H//P+...

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  4. If Tr=r(r^2-1), then find sum(r=2)^oo1/Trdot

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  5. Insert four H.M.’s between 2/3 and 2/13.

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  6. If a , b ,a n dc are respectively, the pth, qth , and rth terms of a G...

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  7. The A.M. and H.M. between two numbers are 27 and 12, respectively, t...

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  8. If a ,a1, a2, a3, a(2n),b are in A.P. and a ,g1,g2,g3, ,g(2n),b . are...

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  9. If nine arithmetic means and nine harmonic means are inserted between ...

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  10. If x ,1,a n dz are in A.P. and x ,2,a n dz are in G.P., then prove tha...

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  11. Find two numbers whose arithmetic mean is 34 and the geometric mean is...

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  12. If a,b,c ,d and p are distinct real number such that (a^2+b^2+c^2)p^2-...

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  13. If A.M. and G.M. between two numbers is in the ratio m : n then prove...

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  14. Prove that (666....6)^2+(888....8)=4444.....4.

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  15. If a is the A.M. of b and c and the two geometric mean are G1 and G2...

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  16. If a,b,c ,d are distinct integer in AP such that d=a^2+b^2+c^2, then a...

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  17. The 8th and 14th term of a H.P. are 1/2 and 1/3, respectively. Find it...

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  18. Find the number of common terms to the two sequences 17,21,25,...,417 ...

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  19. If the 20th term of a H.P. is 1 and the 30th  term is -1/17, then find...

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  20. Find the sum 3/2-5/6+7/(18)-9/(54)+...oodot

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