Question

If x +1/x = 3 , evaluate : (i) x2 + 1/x2 (ii) x4 + 1/x4

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

(i) (x+1/x)² = 3²

x²+1/x²+2 =9

x²+1/x² = 7

(ii) x²+1/x² = 7

(x²+1/x²)² = 7²

x⁴+1/x⁴+2 = 49

x⁴+1/x⁴=47