The information that was given to me was the following: The following are all vectors: a, b, c, d k = (a+b) (c+d) prove: k = (a x c) + (a x d) + (b x c) + (b x d) Any help would be appreciated. Thanks!
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Originally Posted by colerelm1 The information that was given to me was the following: The following are all vectors: a, b, c, d k = (a+b) x (c+d) Mr F says: I assume the important red product was missing ....? prove: k = (a x c) + (a x d) + (b x c) + (b x d) Any help would be appreciated. Thanks! Google: cross product distributive proof
What if I mean to say " k = (a + b) . (c + d)" meaning dot product Does this make a difference from what you had said?
Originally Posted by colerelm1 What if I mean to say " k = (a + b) . (c + d)" meaning dot product Does this make a difference from what you had said? sure would ... $\displaystyle k = (a \times c) + (a \times d) + (b \times c) + (b \times d)$ is a vector $\displaystyle (a + b) \cdot (c + d)$ is scalar.
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