Hello,Originally Posted byeekoz

1. I've attached a diagram to demonstrate what I've calculated.

2. You ought to know that the vector

3. You get three equations, which always describe the vector (OG):

Expand the RHS of this equations. You'll get a system of three linear equations. Solve for k, t, s. You'll get k = t = s = 2/3.

If you plug in this value into one of the equations above and you'll get your proof.

Hope that this is of some help.

Greetings

EB