if x is equal to √2 + 1 find the value of x cube + 1 / x cube
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I think this is the answer
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sankar007:
thanks
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so
X=
then 1/x=
then rationalizing the denominator
we get
then
X cube + 1/X cube=
positive 1 and negetive 1 gets cancelled
then left is
hope it helps
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