if x +1/x =7 find xcube +1/x cube
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one upon x is equal to 7 squaring on both side then you can use the identity of(x+y)^2
by by cancelling x×1/x you will get 2 by transposing 2 ...49-2=47 and x+1/x=7
by by cancelling x×1/x you will get 2 by transposing 2 ...49-2=47 and x+1/x=7
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