If the tangent to the curve, y=x3+ax−b at the point (1,−5) is perp – InterviewSolution

1.	If the tangent to the curve, y=x3+ax−b at the point (1,−5) is perpendicular to the line, −x+y+4=0, then which one of the following points lies on the curve?
Answer» If the tangent to the curve, $y = x^{3} + a x - b$ at the point $(1, - 5)$ is perpendicular to the line, $- x + y + 4 = 0$ , then which one of the following points lies on the curve?

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