Choose the correct options for the following questions.
The positive real number which is the measure of the length of a vector is called the:
Difficulty: Easy
A:
Unit vector
B:
Modulus
C:
Inverse
D:
None
If |a|=|b|=|a+b|=1, then |a-b| is equal to:
Difficulty: Easy
A:
1
B:
$\sqrt{3}$
C:
$\sqrt{2}$
D:
7
If |a|=3, |b|=4, and |a+b|=5, then |a-b|=
Difficulty: Easy
A:
4
B:
6
C:
5
D:
3
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