Question

# If $$a < 0$$, then the function $$f(x) = ax^2 + bx + c$$ has

A
maximum value
B
minimum value
C
constant value
D
positive value

Solution

## The correct option is D maximum valueThe graph of a quadratic equation is parabola.If $$a < 0$$, then the parabola opens downward. If the parabola opens downward, then the vertex is the point whose $$y$$-value is the maximum value of $$f$$Mathematics

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