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Don't be confused (
Posted on 20161114
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If x satisfy the equation x^4  x^2 + 1 = 0 , find the value of x^5 + 1/x
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Submitted by
Danish Ahmed Khan
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Solution
 Comment 2 of 4 
Multiply both sides of x^4  x^2 + 1 = 0 by (x^2 + 1) to get x^6 + 1 = 0.
Then rearrange x^6 + 1 = 0 into x^5 = 1/x.
Then x^5 + 1/x = 1/x + 1/x = 0.
Posted by
Brian Smith
on 20161114 11:13:44
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