InterviewSolution
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InterviewSolution
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Let `f:RrarrR` be the function `f(x)=(x-a_(1))(x-a_(2))+(x-a_(2))(x-a_(3))+(x-a_(3))(x-a_(1))` with `a_(1),a_(2),a_(3) in R`. The fix `f(x)ge0` if and only if -A. At least two of `a_(1),a_(2),a_(3)` are equalB. `a_(1)=a_(2)=a_(3)`C. `a_(1),a_(2),a_(3)` are all distinctD. `a_(1), a_(2),a_(3)`, are all positive and distinct |
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Answer» Correct Answer - B Only when `a_(1)=a_(2)=a_(3)` In other cases f(x) will take both positive and negative values |
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