Question

. If x^3+1/x^3=110, then x+1/x=

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Answer 1

here's ur ans.

ans.- 5

thanks

Answer 2

Answer:

x + 1

___ = 5

x

Step-by-step explanation:

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1 ^3 1 1

: x + ___ = x ^3 + _____ + 3 * x + ____

x x ^3 x

1 ^3 1

: x+ ____ = 110 + 3 * x + ____

x x

Let y= x+ 1

__

x

y^3 = 110 + 3y

y^3 - 3y - 110v= 0

y^3-5y^2+5y^2-3y-110 = 0

y^2 ( y - 5 ) + 5y^2- 25y + 22y-110 = 0

y^2 ( y- 5 ) + 5y ( y-5 )+ 22 ( y - 5 ) = 0

(y-5) ( y^2+5y+22) = 0

y=5