ifx+1/x=3,find x^2+1/x^2
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Answered by
2
Answer:
(x+1/x) ²=x²+1/x² +2
x²+1/x²=(3) ²-2=7
Answered by
19
Answer:
x + 1/x = 3
→ (x + 1/x)2 = 9
→ x2 + 1/x2 + 2 = 9
→ x2 + 1/x2 = 7
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