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The real numbers x1, x2, x3 satisfying t...

The real numbers `x_1, x_2, x_3` satisfying the equation `x^3-x^2+b x+gamma=0` ar ein A.P. Find the intervals in which `betaa n dgamma` lie.

A

`(-oo, 1//3][-1//27, oo)`

B

`(-oo, 3)`

C

`(-1//3, 1//3)(-1//27, 1//27)`

D

none of these

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The correct Answer is:
A
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