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## Main Question or Discussion Point

Hey guys,

Sorry if this is the wrong forum. Someone bump it across if its not.

This is a question on one of my tests (im doing my first semester of Physics at university) and its got to do with the program Matlab.

'I understand some basic matrix algebra, but im still pretty spun out about matrices. can someone guide me through this? (a) thanks!

Sorry if this is the wrong forum. Someone bump it across if its not.

This is a question on one of my tests (im doing my first semester of Physics at university) and its got to do with the program Matlab.

*We have two vectors u and v. Which of the following gives us the unit vector in the direction of v, starting from u?*

a) (v-u)/(u*u')

b) (v-u) * (v - u)

c) (v-u)./mag(v-u)

d) (v-u) / (sqrt(v-u)*(v-u)')

a) (v-u)/(u*u')

b) (v-u) * (v - u)

c) (v-u)./mag(v-u)

d) (v-u) / (sqrt(v-u)*(v-u)')

'I understand some basic matrix algebra, but im still pretty spun out about matrices. can someone guide me through this? (a) thanks!