Question

If
= (x + 2y + z) + (2 − 3 − ) + (4x - y + 2z) k
−
A  i x y z j
is irrotational then the value of

is
(a) − 3
(b)
3
(c)
4
(d) − 4

Answer 1

Answer:

A) -3 is the answer of my knowledge