Question

if a = i + j + 5k and b = i + j + 4k. Compute the cross product a x b.

Answer 1

i come up with 9i -9j + 2k and that isn't correct...can someone show me where i'm going wrong here?

Answer 2

did you try this formula?
a x b=(a2b3-a3b2)i -(a1b3-a3b1)j +(a1b2-a2b1)k

Answer 3

did you get the answer sonofa?

Answer 4

axb=(4-5)i-(4-5)j+(1-1)k
axb=-i +j ans

Answer 5

lol....i fell alseep...sorry