anonymous
  • anonymous
Determine whether the expression make sense mathematically, if not explain why. a) ||u|| . ||v|| b) (u . v) - w c) (u . v)-k d) k . u the . are dot product. I feel like a and c isn't possible but don't quite know the reason
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
a) doesn't make sense because you can't dot product two scalars b) doesn't make sense because you can't combine a vector and a scalar by addition c) doesn't make sense for same reason as b (unless k is a constant) d) makes sense (even if k is a constant)
anonymous
  • anonymous
oh w is a vector
anonymous
  • anonymous
but can we dot product two vectors then subtract them with another vector?

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anonymous
  • anonymous
But the dot product of two vectors is a scalar.
anonymous
  • anonymous
Oh make sense thank you everyone

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