Originally Posted by
afeasfaerw23231233 question: With respect to an origin, O, the points A, B and C have position vectors (2i+5j)m, (-i+2j)m and (7i+15j)m respectively.
(a) Express vector BA, in terms of i and j.
(b) Given that P is the point on BA, between B and A, such that BP/PA =1/2
Write down vector BP, in terms of i and j
(c) Hence, or otherwise, find vector OP, in terms of i and j.
my ans:
(a) -3m(i+j)
(b) -m(i+j)
(c) 3mj
book's ans:
(a) 3i+3j
(b) i+j
(c) 3j
i have no idea where all the 'm' goes