(x+1/x)=5 find (x5+1/x5)
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(x+1)/x=5
x+1=5x
in 5x+1/5, substitute 5x=x+1
you get
5x+1/x+1
x+1=5x
in 5x+1/5, substitute 5x=x+1
you get
5x+1/x+1
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