Question

The non-zero vector a, b and c are such that a x b=c x a. given that b ≠ -c, find a linear relationship between a, b and c

Answers

  1. The Linear relationship between a, b, and c is –  a x (b + c).
    We have three non – zero vectors a, b and c (b ≠ c) and –
    a x b = c x a.
    We have to find the linear relationship between a, b and c.

    If a x b = c x a then is it true that a x b = – (a x c) ?

    Yes, if a x b = c x a then a x b = – (a x c) .
    We have the following vector relation with us –
    a x b = c x a
    It can be written as –
    a x b = (a x c)
    (a x b) + (a x c) = 0
    Using the following vector property : A x (B + C) = A x B + A x C, we get –
    a x (b + c) = 0
    Hence, the Linear relationship between a, b, and c is –
    a x (b + c).
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