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(1)/(2) + (1)/(4) + (1)/(8) + (1)/(16) +...

`(1)/(2) + (1)/(4) + (1)/(8) + (1)/(16) + ….. = x , (1)/(3) + (1)/(9) + (1)/(27) + (1)/(81) + … = `y, then

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