Given that a = 3i + 4j and b = i − 2j, the |a + b| is:
5√4.
2√5.
5√2.
4√5.
Given the vector OP = -4i + 3j, |OP| is:
7.
5.
25.
1.
The figure is a vector diagram where OA = a, OB = b and BE = 2OA, then AE is:
a + b.
3a + b.
a - b.
-a + b.
Given the vector OP = i + j, the direction of this vector is:
45°.
30°.
60°.
90°.
Given that a = 5i + 7j and b = 4i − 5j, then a − 2b is:
3i + 3j.
-3i - 3j.
3i - 17j.
-3i + 17j.
