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Question

If the normal to the curve y = f(x) at the point (1, –1) makes an angle 3π4 with positive x-axis, then f'(1) =


Your Answer
A
-1
Correct Answer
B
1
Your Answer
C
\N
Your Answer
D
2

Solution

The correct option is B 1
Slope of normal =1f(x)(1,1)=1f(1)
But it has been given that 1f(1)=tan3π4f(1)=1

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