The Straight Line Passing Through The Point Of Intersection Of The Straight Lines x – 3y + 1 = 0 And 2x + 5y – 9 = 0 and Having Infinite Slope And At A Distance 2 Unit From The Origin Has The Equation

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Question

The straight line passing through the point of intersection of the straight lines x – 3y + 1 = 0 and 2x + 5y – 9 = 0 and having infinite slope and at a distance 2 unit from the origin has the equation

Solution

Correct option is

x = 2

Any line through the intersection of the given line is

      P + λQ = 0

or  (x – 3y +1) + λ(2x + 5– 9) = 0

Its slope will be infinite if it is perpendicular to x-axis i.e. parallel to y-axis.

Hence the coefficient of y will be zero.

or                .

Putting for λ the line is x = 2 clearly its distance from (0, 0) is 2.

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