engineering recuitment NPCIL Plant Operator Mock Test Mathematics Vector Algebra Scalar and Vector Product
If \(\rm \vec r\) = xî + yĵ + zk̂, then what is \(\rm \vec r\) . (î - ĵ + 2k̂ ) equal to?
1
x - y + z
2
x + y + z
3
x + y + 2z
4
x - y + 2z