Question:

The equation of the line passing through origin which is parallel to the tangent of the curve \(y=\dfrac{x-2}{x-3}\) at \(x=4\) is 

Updated On: Aug 4, 2023
  • \(y=2x\)

  • \(y=2x+1\)

  • \(y=-x\)

  • \(y=x+2\)

  • \(y=4x\)

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The Correct Option is C

Solution and Explanation

Given that:

\(y=\dfrac{x-2}{x-3}\)

at \(x=4\)\(y=\dfrac{2}{1}=2\)

Hence we can write,

\(\dfrac{dy}{dx}=\dfrac{(x-3)-(x-2)}{(x-3)^2}\)

at \( x=4\) ,  \(\dfrac{dy}{dx}=-1\)

Tangent can be represented as 

\(y-2=-1(x-4)\)

\(x + y − 6 = 0\)

\(x + y + k = 0\)

Comparing both these equation we  found 

\(x+y=0\)

\(\therefore x=-y\) (_Ans)

 

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