−18
18
−124
1
Correct answer is A
Given : y=x3−x2
dydx=3x2−2x
∴
= 12 - 4 = 8
Recall, the tangent and the normal are perpendicular to each other and the product of the gradients of perpendicular lines = -1.
\implies \text{the gradient of the normal} = \frac{-1}{8}
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