Question

Find the value of p. if the points A (2, -1, 1), B (4,0,p), C (1, 1,1) and D (2,4.3) are coplanar.

Answer 1

Since I don't have a pen in my hand right now(sorry for that)
I will provide u a method to do this
Find vector AB,BC,CD
Then take determinant of this three vectors and equate it to zero.
You will get the value of p
Hope it helps
:)
(Btw if u still don't get the answer let me know in the comments)
I will provide u with the full solution later....