Question

(i) Write the unit vector in direction of i + 2j – 3k.
(ii) If \(\overline {PQ}\) = 3i + 2j - k and the coordinate of P are(1, -1,2) , find the coordinates of Q.

Answer 1

(i) unit vector = \(\frac{i + 2j -3k}{\sqrt{1 +4+9 }}= \frac{i+2j -3k}{\sqrt{14}}\)