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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  • Anonymous
    1 decade ago
    Best 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

  • oracle
    Lv 5
    1 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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