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If y = x+ (1)/(x +(1)/(x+(1)/(x+ . . ....

If y = `x+ (1)/(x +(1)/(x+(1)/(x+ . . . . )))` prove that ` ( dy)/( dx) = (y)/( 2 y - x)`

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The correct Answer is:
` ( y)/( 2 y - x)`
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