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06 Aug 2006, 09:13
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07 Aug 2006, 04:18
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IMO C
1) (3r+2-s)(4r+9-s) = 0
hence either
3r+2-s = 0
s = 3r+2
This proves point (r,s) is on line y=3x+2
Or
4r+9-s = 0
s = 4r+9
This doesnot prove whether point(r,s) is on line y = 3x+2
2) same as above
together
We get s= 3r+2
hence point (r,s) lies on line y=3x+2
1) (3r+2-s)(4r+9-s) = 0
hence either
3r+2-s = 0
s = 3r+2
This proves point (r,s) is on line y=3x+2
Or
4r+9-s = 0
s = 4r+9
This doesnot prove whether point(r,s) is on line y = 3x+2
2) same as above
together
We get s= 3r+2
hence point (r,s) lies on line y=3x+2
