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The sum of first three terms of a G.P. i...

The sum of first three terms of a G.P. is 21 and sum of their squares is 189. Find the common ratio :

A

1/2 or 2

B

3 or 1/3

C

4 or 1/4

D

none of these

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The correct Answer is:
A
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QUANTUM CAT-SEQUENCE, SERIES & PROGRESSIONS-QUESTION BANK
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  3. The sum of first three terms of a G.P. is 21 and sum of their squares ...

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  4. The sum of the first and the third term of G.P. is 15 and that of the ...

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  11. If the pth, qth and rth terms of a G.P. be respectively , a,b and c th...

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  13. There are four numbers such that the first three of them form an Arith...

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  14. Find the sum of n terms of the series 1+3 +7 +15 + …

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  20. Find the sum to infinity of the series 1+3x+5x^2+7x^3+oow h e n|x|<1.

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