Discrete Math Quiz
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LOGIC AND PROOF
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When proving "If f(x)=ax2+bx+cf(x) = ax^2 + bx + c where a>0a > 0, and the discriminant b2−4ac<0b^2 - 4ac < 0, then f(x)>0f(x) > 0 for all real xx," which approach best exemplifies direct proof methodology?
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