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Question Number 76302 by john santuy last updated on 26/Dec/19

$$givenvektora=(3,x,-2)$$$$b=(-6,-2,y).whatthevaluex$$$$andyifaandbareparallel?$$

Answered by benjo last updated on 26/Dec/19

$$\mathrm{a}\times \mathrm{b}=0$$$$\mathrm{a}\times \mathrm{b}=(\mathrm{xy}-4)\mathrm{i}-(3\mathrm{y}-12)\mathrm{j}+(6\mathrm{x}-6)\mathrm{k}$$$$=0.\mathrm{therefor}\mathrm{y}=4,\mathrm{x}=1$$

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