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  4. The following figure shows the graph of f(x)=a x2-b x+c. Then which one of the following is correct?

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Q. The following figure shows the graph of $f(x)=a x^2-b x+c$. Then which one of the following is correct?Mathematics Question Image

Complex Numbers and Quadratic Equations

Solution:

From above figure, clearly $a > 0, c > 0$ and $b < 0.$Now verify alternatives