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For what value of x, the numbers -2/7,x....

For what value of x, the numbers `-2/7,x.-7/2` are in G.P ?

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`-2/7, x, -7/2` are in G.P`
`x+-2/7=-7/2+x rarr x xx -7/2=-7/2 xx 1/x`
`rarr x^2 xx -7/2=-7/2 rarr x^2=1 rarr x=+- 1`
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  4. Find the sum to 20 terms of 0.15,0.015,0.0015,..

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  7. Find the sum to n terms of the G.P.x^3,x^5,x^7,…(xne+-1)

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  12. Given.a G. P. with a=729 and 7^ (th) term 64, determine S7 ?

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  13. The sum of the first two terms of a GP Is -4 and the fifth term is 4 t...

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  19. If the first and the n^( th) term of a .G. P are a and b, respectivel...

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