Khan Academy
5:49
Khan AcademySal Khan
Khan Academy
A vector has both magnitude and direction. We use vectors to, for example, describe the velocity of moving objects. In this video, you'll learn how to write and draw vectors.
2013年11月1日
Khan Academy Algebra
Khan Academy
Khan Academy
khanacademy.org
2022年6月10日
17K views · 386 reactions | Ever heard (or felt) “I’m just not a math person”? Try practicing on Khan Academy: instant feedback, no judgement, a variety of questions, and hints along the way. Give it a try!  khan.co/mathonkhan | Khan Academy | Facebook
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17K views · 386 reactions | Ever heard (or felt) “I’m just not a math person”? Try practicing on Khan Academy: instant feedback, no judgement, a variety of questions, and hints along the way. Give it a try!  khan.co/mathonkhan | Khan Academy | Facebook
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