Q.

If the line through the points (h, 7) and (2, 3) intersects the line 3x – 4y – 5 = 0 at right angles, then the value of h is

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a

-1

b

1

c

5

d

-5

answer is A.

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Detailed Solution

Product of the slopes of the given lines is – 1.⇒34×7−3h−2=−1h=−1
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If the line through the points (h, 7) and (2, 3) intersects the line 3x – 4y – 5 = 0 at right angles, then the value of h is