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If x+1/x=7 then x^3-1/(x^3) is...

If `x+1/x=7` then `x^3-1/(x^3)` is

A

`9sqrt(5)`

B

`144sqrt(5)`

C

`135sqrt(5)`

D

`sqrt(5)`

Text Solution

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The correct Answer is:
B
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PEARSON IIT JEE FOUNDATION-POLYNOMIALS, LCM AND HCF OF POLYNOMIALS -CONCEPT APPLICATION (LEVEL 1)
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