anonymous
  • anonymous
Find the dot product a = 6i + 5j, b = -5i + 4j
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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caozeyuan
  • caozeyuan
well, A*B=a1b1+a2B2 where A=(a1,a2) B=(b1,b2)
Astrophysics
  • Astrophysics
\[a \cdot b = (6 \times -5)i+(5 \times 4) j\]
Astrophysics
  • Astrophysics
It's the same thing as matrix multiplication if you've done that

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caozeyuan
  • caozeyuan
@Astrophysics isn't dot suppose to yiled scalar not vector?
Astrophysics
  • Astrophysics
Yes, it is a scalar

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