Find the value of x such that
is a vector parallel to the plane through the points A = (0,1,1), B= (1,1,0), and C = (1,0,3) .
x = -7.
NOTE: I know almost nothing about vectors:
Here is a youtube for getting the equation of the plane that passes through 3 specific points
And here is one to help you find the angle between two vectors (you need an angle of 90 degrees.
I muddled through these and possibly came up with an answer but I expect you are capable of doing it just as easily as me.
Try doing the video examples then try doing your own one.