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OpenStudy (anonymous):
Help! Find 3U + 2V given the vectors U=-i + 4j and V = 2i - 3j
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OpenStudy (anonymous):
Can you find 3U first?
OpenStudy (anonymous):
No :/ i just started my trig class this week and im conpletely lost!
OpenStudy (anonymous):
Okay there are two things you need to learn: 1. Scalar multiplication (multiplying a vector by a scalar (normal number)) 2. Vector addition (adding two vectors)
OpenStudy (anonymous):
For scalar multiplication: 3U = 3(-i + 4j) You just have to use the distributive property.
OpenStudy (anonymous):
3U = -3i+14j
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OpenStudy (anonymous):
Does that make sense?
OpenStudy (anonymous):
Ooh i got thatt
OpenStudy (anonymous):
Now can you do 2V?
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