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Find |𝘂|, |𝘃|, |2𝘂|, |1/2𝘃|, |𝘂 + 𝘃|, |𝘂 − 𝘃|, and |𝘂| − |𝘃|.

𝘂 = 4i + j, 𝘃 = 5i − 3j

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oobleck

oobleck answered
3 years ago

what's the trouble? Just use your usual formulas. For example,

|u|-|v| = √(4^2+1^2) - √(5^2+3^2) = √17 - √34 = (34√2 - 51)/17 = 2√2 - 3

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