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Mathematics: Post your doubts here!

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A star i have to go right now but i'll do it and post later today :)
i have done a bit of it actually :)
just the equations are complicated otherwise its just like any other such question :)
just do it with a clear head and fresh start and u'll be able to do it :)
no noproblem go i did it anyway :)
 

Maz

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AB = b -a = (k-1 , -k, 2k - 2)

Unit vector = vecter/ magnitude

Therefore, (k-1, -k, 2k-2)/[sqrt] (k-1)^2 + (-k)^2 + ((2k -2)^2
Since they have said that the vector AB is the unit vector, the magnitude would equal 1.
Equate the magnitude you should get the answer.
thanks (y)
 
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