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WBJEE 2019 Math Solved Paper
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© examsnet.com
Question : 3
Total: 75
The equation of the plane, which bisects the line joining the points (1,2,3) and (3,4,5) at right angles is
x + y + z = 0
x + y – z = 9
x + y + z = 9
x + y – z + 9 = 0
Validate
Solution:
(C)
Equation of required plane is (3 – 1)x + (4 – 2)y + (5 – 3)z = k which passes through (2, 3, 4)
⇒ k = 9
⇒ equation of plane is x + y + z = 9
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