Let PS be the median of the triangle with ertices P (2, 2), Q (6, -1) and R (7, 3). The equation of the line passing through (1, -1) and parallel to PS, is
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a
2x-9y=7
b
2x-9y-11=0
c
2x+9y-11=0
d
2x+9y+7=0
answer is D.
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Detailed Solution
The coordinates of S are6+72,−1+32=132,1Slope of PS=1−2132−2=−29Equation of a line passing through (1, -1) and parallel to PS is y+1=−29(x−1)⇒2x+9y+7=0