Math, asked by somrajdas1975, 10 months ago

pls answer fast!!!!!!

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Answered by Anonymous

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$\large \tt {{x}^{3} + \frac{1}{ {x}^{3} } = 110}$

$\large \tt {{(x + \frac{1}{x} )}^{3} - 3(x + \frac{1}{x} ) = 110}$

$\large \tt {Let \: x+1/x \: be \: k, \: so \: that}$

$\large \tt { {k}^{3} - 3k - 110 = 0}$

$\large \tt {k( {k}^{2} - 3) = 110}$

$\large \tt {k( {k}^{2} - 3) = 5( {5}^{2} - 3)}$

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