Question

If x =2 +√3,
find ( x+ 1 / x ) ^3​

Answer 1

Answer:

x = 2+√3 evaluate (x+1/x)³

1/x = 1/(2+√3)×(2-√3)/(2-√3) = (2-√3)/ (4 - 3)

= (2-√3)/1

= 2-√3

now x + 1/x = 2+√3+2-√3

=> 4

therefore (x +1/x)³ = 4³

= 64

Answer 2

hope it helps you ✌✌

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