Vector u has its initial point at (21, 12) and its terminal point at (19,-8). Vector v has a direction opposite that of u, whose magnitude is five times
the magnitude of v. Which is the correct form of vector v expressed as a linear combination of the unit vectors i and j?
A.
v= -101 + 4j
B.
v=-0,41 - 4j
C.
v=0,41 +4j
D.
v = 15i + 100)