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Let conditions C1 and C2 be defined as f...

Let conditions C1 and C2 be defined as follows: `C1: b^2- 4ac > 0`, `C2: a, -b, c `are of same sign. The roots of `ax^2+ bx + c = 0` are real and positive, if (a) both C1 and C2 are satisfied (b) only C2 is satisfied (c) only C1 is satisfied (d) None of these

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