Question

If x²+1/x = 5/2 find x-1/x and x²+ 1/x²
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Answer 1

Answer:

(iii) 2(x2 + 1/x2 ) – 9(x+1/x) + 14 = 0

Sol. 2(x2 + 1/x2 ) – 9(x+1/x) + 14 = 0

∴ 2[(x + 1/x)2 – 2] - 9(x+1/x) + 14 = 0

[∵(x2 + 1/x2 ) = [(x + 1/x)2 –

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