What will be the nature (sign) of U-shaped or inverted U-shaped coefficients of quadratic term?
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A quadratic function has the form f(x) = a + bx + cx2 , and its graph is a parabola, a particular type of “U”-shaped curve. The curve bends upwards if c > 0 , and downwards (i.e., is an inverted “U”) if c < 0 . The further c is from zero, the sharper the bend of the curve.
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