Answer:
R=0.5B+0.5C+2A+D
Explanation:
By the triangular law of vector addition
vector R= vector B- vector D
As A,B,C,D are edges of the parallelogram,
A is parallel to D but opposite in direction.
Therefore
[tex]A = (-D)[/tex];[tex]A//D[/tex];
[tex]2A=-2D[/tex]
B is parallel to C and in same direction.
[tex]B//C\\B=C\\[/tex]
[tex]0.5B=0.5C\\[/tex]
[tex]R= B-D;\\R= 0.5B+0.5B-D;\\R=0.5B+0.5C-D;\\R=0.5B+0.5C-2D+D;\\R=0.5B+0.5C+2A+D;[/tex]
