Question

if x+1/x=4,then find the value for
${x}^{3} + \frac{1}{ {x}^{3 } } = what$

Answer 1

x+1/x=4 then value of x³+1/x³ will be:-
(x+1/x)³=x³+1/x³+3(x+1/x)
(4)³=x³+1/x³+3(4)
64=x³+1/x³+12
64-12=x³+1/x³
52=x³+1/x³


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