Straight Line and Pair of Straight Lines 1 Question 21

21. If PS is the median of the triangle with vertices P(2,2), Q(6,1) and R(7,3), then equation of the line passing through (1,1) and parallel to PS is

(2014 Main, 2000)

(a) 4x7y11=0

(b) 2x+9y+7=0

(c) 4x+7y+3=0

(d) 2x9y11=0

Show Answer

Solution:

  1. Coordinate of S=7+62,312=132,1

[S is mid-point of line QR]

Slope of the line PS is 29.

Required equation passes through (1,1) and parallel to PS is

y+1=29(x1)2x+9y+7=0



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक