Prove that if 1. 2. 3. Here are the first three steps of the solution i have in the book, i know how to go after step three, here is what i can't figure out: What is done in step 1 that leads to step 2? Why is ?
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What is ?
it's a radivector. Wasn't able to find a right translation of the word. If you don't understand what it is i'll try to explain.
Here is one way to rewrite the notation to avoid confusion. . Now the definition is a bit easier to understand. Clearly .
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