If the point x1+tx2−x1,y1+ty2−y1 divides the join of x1,y1 and x2,y2 internally, then
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a
t<0
b
0
c
t>1
d
t=1
answer is B.
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Detailed Solution
x coordinate of the point x1+tx2−x1,y1+ty2−y1 can be rewrite as x1+tx2-tx11=x11-t+tx2t+1-tthis gives the x -coordiante of a point which divides the line segment joining the given points in the ratio t:1-t internallyhere 1-t>0⇒t<1