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Question
If `x + (1)/x = 3`; find `x^4 + (1)/x^4`
Sum
Solution
squaring both sides of the equation `(x^2 + (1)/x^2)` = 7 , we get:
`x^4 + (1)/x^4 + 2`
= 49
`x^4 + (1)/x^4`
= 47.
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