Question -
Answer -
The equations of thegiven lines are
Two lines withdirection ratios is given as
a1a2 +b1b2 + c1c2 = 0
So the directionratios of the given lines are 7, -5, 1 and 1, 2, 3
i.e., a1 =7, b1 = -5, c1 = 1 and
a2 =1, b2 = 2, c2 = 3
Now, Considering
a1a2 +b1b2 + c1c2 = 7 × 1 +(-5) × 2 + 1 × 3
= 7 -10 + 3
= – 3 + 3
= 0
∴ The two linesare perpendicular to each other.