differentiation

Question: The tangent to the curve $y=a{{x}^{2}}+bx$ at $(2,\,-8)$ is parallel to x-axis. Then

1) $a=2,\,b=-2$

2) $a=2,\,\,b=-4$

3) $a=2\,\,b=-8$

4) $a=4,\,b=-4$

Solution:

Explanation: No Explanation

Tangent and Normal

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