gvn is trivial ≥ 0
now gvn = 3 Σ |a|2 - |a + b + c|2 = 9 - |a + b + c|2 ≤9
If a ,b and c are unit vectors,then show that
0≤ ∣∣∣a⃗−b⃗∣∣∣2+∣∣∣b⃗−c⃗∣∣∣2+∣c⃗−a⃗∣2≤9
gvn is trivial ≥ 0
now gvn = 3 Σ |a|2 - |a + b + c|2 = 9 - |a + b + c|2 ≤9