The value of f’(x) is -1 at the point P on a continuous curve y = f( – McqOptions

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1.	The value of f’(x) is -1 at the point P on a continuous curve y = f(x). What is the angle which the tangent to the curve at P makes with the positive direction of x axis?
A.	π/2
B.	π/4
C.	3π/4
D.	3π/2
Answer» D.

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