x+1/x is 7 find x^3+1/x^3
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Answer: your answer is X= 5
Answer:
x+1/x=7
x+1=7x
x=1/6
x^3+1/x^3= (1/6)^3+1/(1/6)^3
= (1/216)+1/(1/216)
= (217/216)/(1/216)
= 217
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