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theory of eqn---challenge
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Let f(x) = ax3 + bx2 + cx + d f'(x) = 3ax2 + 2bx + c It is possible that f(x) has only one real root when it is increasing or decreasing. Then discriminant of f'(x) should be less than zero. D = (2b)2 - 4(3a)(c) < 0 b2 < 3ac |
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Bipin Kumar Dubey Chemical Dept. IIT Kharagpur |
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