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If for a G.P. { t(n)}, S(2)=15 and S(4)=...

If for a G.P. `{ t_(n)}, S_(2)`=15 and `S_(4)`=255, find a and r.

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MARVEL PUBLICATION-SEQUENCES AND SERIES -MULTIPLE CHOICE QUESTIONS
  1. If for a G.P. { t(n)}, S(2)=15 and S(4)=255, find a and r.

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  2. If for a G.P., a=8 and t(4)=64 then : r =

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  3. If for a G.P., r=2 and t(9)=128, then : a =

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  4. If, for a G.P., t(3) =0.08 and t(7) =0.000128, then : (a,r) -=

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  5. If for a G.P., S(2) =8 and S(4)=80 , then : (a,r) -=

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  6. If for a G.P., r=2 and S(8)=510, then : t(3) =

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  7. If for a G.P., t(3)=36 and t(6)=972, then : t(8) =

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  8. If for a G.P. , t(8) :t(3) =32 and S(9)=255, then : t(1)=

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  9. If for a G.P., S(3) : S(6) =125 : 152 then : r =

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  10. If for a G.P., a=5, r=2 and S(n) =635 then : n =

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  11. If the n^(th) term of a G.P. is 3 (4^(n+1)) then its first term and co...

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  12. If 2+x, 3+x, 9+x are in a G.P., then : x =

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  13. If the positive numbers 3,x,5,y are in a G.P., then : (x,y)=

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  14. Four number in G.P. such that the product of their extremes is 108 and...

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  15. Three given numbers whose sum is 24 are in an A.P. If the first is dec...

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  16. Three numbers whose sum is 18 are in AP if 2,4, 11 are added to them r...

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  17. If the 5^(th) and 8^(th) terms of a G.P. are 32 and 256 respectively ....

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  18. If 5^(th) , 8^(th) and 11^(th) terms of a G.P. are p,q and s respectiv...

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  19. If x,y,z are in G.P. then log x , log y, logz, are in

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  20. If the third term of G.P.is 4, then find the product of first five ter...

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  21. If x, 2x+ 2, 3x + 3 are in G.P. , then the fourth term is

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