Q3Short answer
(3 –1) + 5( 5 + 6 (6 –3 ) = 0 9 + 25 + 36 = 21, i.e. 1 ˆ 15 ˆ 12 ˆ Thus PQ = − 10 i + 10 j − 10 k 1 37 Hence PQ = 1+ 225 +144 = . 10 10
(3 –1) + 5( 5 + 6 (6 –3 ) = 0 9 + 25 + 36 = 21, i.e. 1 ˆ 15 ˆ 12 ˆ Thus PQ = − 10 i + 10 j − 10 k 1 37 Hence PQ = 1+ 225 +144 = . 10 10