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Second Derivative Test for Local Maximum

Find the leng...

Question

Find the length of sub -tangent of parabola $y^{2} = 4 x$ at $(1, 1)$ .

A

2

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B

4

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C

6

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D

8

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Solution

The correct option is B 2
length of subtangent is $= \frac{y}{m} = \frac{1}{2}$

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