# Find ||v||?

Find ||v|| for each question below. I want you to explain what to do NOT just simply provide answers.

(1) v = -5i + 12j

(2) v = - i - j

### 2 Answers

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- Anonymous1 decade agoBest Answer
IIvII is the magnitude of a vector.

1) v = -5i +12j - Disregard the i and j and focus on the numbers.

therefore v = -5 + 12.

to work out the magnitude you need to square (-5) and 12, add them together and then take the square root.

v = sqroot ((-5)sq + (12)sq)

v = sqroot (25 + 144)

v = sqroot (169)

v = 13

- oracleLv 51 decade ago
complex numbers have real and imaginary parts, ok?

have you heard of Mr Pythagoras?

well, now you are on your own

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