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Find the sum off the terms of an infinite decreasing G.P. in which all the terms are positive, the first term is 4, and the difference between the third and fifth term is equal to 3/81.

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Find the sum off the terms of an infinite decreasing G.P. in which all the terms are positive, the first term is 4, and the difference between the third and fifth term is equal to 32/81.

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If the sum of an infinitely decreasing G.P. is 3, and the sum of the squares of its terms is 9//2 , the sum of the cubes of the terms is

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  3. The first term of an infinite geometric series is 21. The second term ...

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  4. Given that x+y+z=15 when a ,x ,y ,z ,b are in A.P. and 1/x+1/y+1/z=5/3...

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  5. Let a1,a2,a3…… ,an be in G.P such that 3a1+7a2 +3a3-4a5=0 Then common...

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  6. The consecutive digits of a three digit number are in G.P. If middle ...

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  7. If Sn=1^2-2^2+3^2-4^2+5^2-6^2+ ,t h e n S(40)=-820 b. S(2n)> S(2n+2) ...

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  8. If sum(r=1)^n r(r+1)(2r+3)=a n^4+b n^3+c n^2+d n+e , then (a) a-b=d-c ...

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  9. Find the sum off the terms of an infinite decreasing G.P. in which all...

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  10. If a,x,b are in A.P.,a,y,b are in G.P. and a,z,b are in H.P. such that...

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  11. If a,b, and c are in G.P then a+b,2b and b+ c are in

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  18. The sum of three numbers in G.P. is 14. If one is added to the first ...

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  19. If x ,2x+2 and 3x+3 are the first three terms of a G.P., then the four...

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