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(X,Y )(1,2)(7,0)are collinear. What is the relation between X and Y? |
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Answer» Area of ∆ formed =0 [x1=X ,x2=1 ,x3=7 ,y1=Y ,y2=2 ,y3=0]1/2{x1(y2-y3)+x2 (y3-y1)+x3 (y1-y2)} =0X(2-0)+1(0-Y)+7(Y-2)=02X-0+1-Y+7Y-14=02X-13-6Y=0Hence ,X and Y form a linear equation. Collinear ki property lags do |
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