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If x and y are positive real numbers such that ` 2log(2y - 3x) = log x + log y," then find the value of " x/y`. |
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Answer» Correct Answer - `4/9` We have ` 2log(2y - 3x)= log x + log y` ` rArr log(2y-3x)^(2) = log xy` ` rArr 4y^(2) - 12xy + 9x^(2) = xy` `rArr 4y^(2) - 13xy + 9x^(2) = 0` ` rArr (4y-9x)(x-y) = 0` ` rArr 4y = 9x ` (As for x = y , LHS is not defined) ` rArr x/y = 4/9` |
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