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Question

If α,β are the roots of equation x24x1=0, then the value of (α1/3+β1/3) is

A
1
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B
2
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C
3
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D
4
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Solution

The correct option is A 1
α=2+5
β=25
Consider
x=32+5+325
(x32+5325)=0
x3(2+5)(25)=3x(1)
x34=3xx3+3x4=0
(x1)(x2+x+4)=0
Hence, x=1.

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