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17-04-2017
Mathematics

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Determine whether the parabola y = −x2 + 15x + 8 opens up, down, left, or right.

Respuesta :

17-04-2017

dy/dx=-2x+15

d2y/dx2=-2

Since the acceleration is a constant negative it has an absolute maximum value for y(x), thus it opens downward, as x decreases without bound as x approaches ±∞

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