Question

Prove with a diagram that for any vectors a and b, and , |a + b| less than equal to |a| + |b|.

Answer 1

help pls

Answer 2

can't quite explain but i'll give you an example. If a=2 and b=-4, lal+lbl=6 but la+bl=2..

Answer 3

taking the absolute value of each term will always give you a resultant vector greater in magnitude if one of your vector is negative..