B bubb Member Joined Oct 3, 2014 Messages 31 Gender Female HSC 2013 Feb 14, 2015 #1 Vectors & are defined in terms of , & as: = + ( + ) − (2 + ) = + (3 + 2) − (5 − 3) If = then show that: |1.25 + 5 + 6| = √46
Vectors & are defined in terms of , & as: = + ( + ) − (2 + ) = + (3 + 2) − (5 − 3) If = then show that: |1.25 + 5 + 6| = √46
B braintic Well-Known Member Joined Jan 20, 2011 Messages 2,137 Gender Undisclosed HSC N/A Feb 14, 2015 #2 If a=b then equating vector components: z=1 x+y = 3y+2 x=2y+2 2x+y=5x-3 y=3x-3 Solving the last two simultaneously: y=-3/5, x=4/5, (z=1) | 1.25xi +5yj +6zk | = | i - 3j +6k | = sqrt (1^2 + 3^2 +6^2) = sqrt 46
If a=b then equating vector components: z=1 x+y = 3y+2 x=2y+2 2x+y=5x-3 y=3x-3 Solving the last two simultaneously: y=-3/5, x=4/5, (z=1) | 1.25xi +5yj +6zk | = | i - 3j +6k | = sqrt (1^2 + 3^2 +6^2) = sqrt 46
