﻿   If the pair of lines  have exactly one line in common, then a = : Kaysons Education

# If The Pair Of Lines  have Exactly One Line In Common, Then a =

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## Question

### Solution

Correct option is

– 3

Let y = mx be a line common to the given pairs of lines. Then,

and,

But, for a = 1, the two pairs have both the lines common.

Hence,  a = –3.

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