Find direction numbers for the line of intersection of the planes x + y + z = 7 and x + z = 0. (enter your answers as a comma-se parated list.)
1 answer:
The line of intersection has a direction vector that is the cross product of the normal vectors of the given planes.
... [1, 1, 1] × [1, 0, 1] = [1, 0, -1] . . . . . . using a suitable calculator
The direction numbers of the line of intersection are (1, 0, -1) .
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