Straight Line and Pair of Straight Lines 1 Question 8
8. Suppose that the points and lie on the line . If a line passing through the points and is perpendicular to , then equals
(a)
(b)
(c) 3
(d) 0
(2019 Main, 8 April II)
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Solution:
- Given, points
and are lies on line , so slope of line is
and slope of line
Since, lines
On solving Eqs. (ii) and (iv), we get