The roots of the equation x3 - 2x2 - 5x - 2cos x - 0 in -0- 2- is

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Nature of Roots of a Cubic Polynomial Using Derivatives

The roots of ...

Question

The roots of the equation $x^{3}$ + 2 $x^{2}$ + 5x + 2cos x = 0 in [0, 2 $π$ ] is

only one root

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only two roots

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only three roots

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NO ROOTS EXIST

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x^{3}

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