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Question -

Find the equation of a line which is perpendicular to the line√3x – y + 5 = 0 and which cuts off an intercept of 4 units with the negative direction of y-axis.



Answer -

Given:

The equation isperpendicular to √3x – y + 5 = 0 equation and cuts off anintercept of 4 units with the negative direction of y-axis.

The line perpendicularto √3x – y + 5 = 0 is x + √3y + λ = 0

It is given that theline x + √3y + λ = 0 cuts off an intercept of 4 units with thenegative direction of the y-axis.

This means that theline passes through (0,-4).

So,

Let us substitute thevalues in the equation x + √3y + λ = 0, we get

0 – √3 (4) + λ = 0

λ = 4√3

Now, substitute thevalue of λ back, we get

x + √3y + 4√3 = 0

The required equationof line is x + √3y + 4√3 = 0.

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