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Please Help! I just don’t get it and I’ve been studying for days.

Question :

Knowing that Vectors

**C**= (4i+1j-3k) meters and

**D**=(2i-3j-5k) meters

Determine:

a.

**S**=C-D

b. │

**S**│

c. The Unit vector in the direction of

**S**

My Prof has given us a test one week after the first class and I just don’t get these study questions. I can add and multiply vectots but this stuff I just don’t get and there is noone to help.

If anyone out there can help you’ll really be appreciated

Pamela