Q.
The coordinates of the point where the line through 3,-4,-5 and 2,-3,1 crosses the plane 2x+y+z=7 is
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a
-1,2,7
b
1,-2,7
c
1,2,7
d
-1,-2,7
answer is B.
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Detailed Solution
Equation of line through (3,-4,-5) and (2,-3,1) is x−3−1=y+41=z+56=tpoint (3-t,-4+t,-5+6t) subtute in given plane now solve this line and the given plane
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