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If the equation 4x^2 - 3kx + 1 = 0 has equal roots then value of k = ?

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If the equation 4x2 - 3kx + 1 = 0 has equal roots then value of k = ?

(a) ± 2/3

(b) ± 1/3

(c) ± 3/4

(d) ± 4/3

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Correct answer is (d) ± 4/3

It is given that the roots of the equation (4x2 - 3kx + 1 = 0) are equal

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