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(b) For w as in part (a), what can you say about the values of and ? Explain your
reasoning.
If , is it valid to cancel u from both sides of the equation and conclude that
36. ? Explain your reasoning.
Something is wrong with one of the following expressions. Which one is it and what is wrong?
37.
What can you say about the vectors u and v if ?
38.
Give some examples of algebraic rules that hold for multiplication of real numbers but not for the
39. cross product of vectors.
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