Given that a=i-2j and b=-3i+j find λ if a+λb is parallel to -i-3j.
please help. I have my a-level exam in 2 days and this question is killing me, plus the mechanics book doesnt even show how solve these questions.
Thanks for the help.
i used a+λb
then written in terms of i and j gives:
(1-3λ)i + (λ-2)j=-i-3j
to make them the same *(i) by 3 giving: (and if a is parallel to be a=b)
which symplifies to get: