Oblio
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This technically a homework question, but needed for homework and understanding for homework to come. Just hope to get it cleared up, thanks again!
1. This formula is given:
r_{1}s_{1} + r_{2}s_{s}+ r_{e}s^{3} = \sumr_{n}s_{n} (with the limits etc. not too important).
Then, in respect to scalar products, the magnitude of any vector is denoted by l r l or by Pythoagora's theorem: square root of[r(1)^{2} + r(2)^{2} + r(3)^{2}]
(couldn't find square root in latex)
and that THAT is the same as square root of [r . r]
This last step I do not follow...
1. This formula is given:
r_{1}s_{1} + r_{2}s_{s}+ r_{e}s^{3} = \sumr_{n}s_{n} (with the limits etc. not too important).
Then, in respect to scalar products, the magnitude of any vector is denoted by l r l or by Pythoagora's theorem: square root of[r(1)^{2} + r(2)^{2} + r(3)^{2}]
(couldn't find square root in latex)
and that THAT is the same as square root of [r . r]
This last step I do not follow...