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Question

Find the length of sub -normal of x24−y29=1 at (2,0).

A
92
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B
3
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C
192
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D
None of these
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Solution

The correct option is A 92
Length of sub-normal
=y1(dydx)(x1,y1)
dydx=9x4y
put this in length of sub-normal equation
=y1(9x14y1)(2,0)
=184=92

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