If 0 lt x lt 1 and y = x - x^(2) + x^(3)...

If `0 lt x lt 1` and `y = x - x^(2) + x^(3) - x^(4) + ....... infty` then `y + y^(2) + y^(3) + ......... infty` is equal to

`x`

`1/x`

`y/(1 - y)`

`(x - 1)/x`

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NEW JOYTHI PUBLICATION-SEQUENCES AND SERIES -EXERCISE

the sum of the first six terms of a GP is 9 times the sum of the first...
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In a GP of positive succeeding terms terms. The common ratio is
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If G is the GM between a and b the 1/(G + a) + 1/(G + b) =
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cos x = b for what b do the roots of the equation form an A.P?
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