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The equation of normal to the curve y = ...

The equation of normal to the curve y = `log_(e)` x at the point P( 1, 0) is ..... .

A

2x+y=2

B

x-2y=1

C

x-y=1

D

x+y=1

Text Solution

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The correct Answer is:
D

We have, y`=log_(e)xrArr(dy)/(dx)=1/x`
`therefore` Slope of normal at P(1,0)
`=-1/((dy//dx)_((1,0)))`
`=(-1)/1`=-1
`therefore` Equation of normal at P(1,0)
`rArry-0=(-1)(x-1)`
`rArry=-x+1`
`rArrx+y=1`
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