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If log12 18 = x and log24 54 = y, prove that 5(x - y) + xy = 1.

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If log12 18 = x and log24 54 = y,

prove that 5(x - y) + xy = 1.

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x = log1218

Let log 3 = a and log 2 = b

= 1

= R.H.S.

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