What is the projection of (1,2,3)(1, 2, 3)(1,2,3) onto the plane x+y+z=0x+y+z=0x+y+z=0?
(0,1,−1)(0, 1, -1)(0,1,−1)
(1,1,1)(1, 1, 1)(1,1,1)
It cannot be calculated
(1,2,3)−projn(v)(1, 2, 3) - \text{proj}_n(v)(1,2,3)−projn(v) where n=(1,1,1)n=(1,1,1)n=(1,1,1)