InterviewSolution
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InterviewSolution
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`Let x=(sqrt(50)+7)^(1//3)-(sqrt(50)-7)^(1//3)`.Then-A. x=2B. x=3C. x is a rational number, but not an integerD. x is an irrational number |
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Answer» Correct Answer - A `x=(sqrt(50)+7)^(1//3)-(sqrt(50)+7)^(1//3)` `x^(3)=(sqrt(50)+7)-(sqrt(50)-7)-3(sqrt(50)+7)(sqrt(50)+7)^(1//3)-(sqrt(50)-7)-(sqrt(50)+7)^(1//3)` `x^(3)=14-3(1)(x)` `x^(3)=14-3x` `x^(3)+3-14=0` x=2 |
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