Let L be line obtained from the intersection of two planes and . If point P is the force of perpendicular from (3,2,1) on L, then the value of equals:
Option: 1 102
Option: 2 136
Option: 3 68
Option: 4 142
Given the equation of two plane
x + 2y + z = 6
y + 2z = 4
solving above equation, we get
⇒ The line of intersection of two planes is
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