Ответ:
[tex]{|A|}=\left (A_ {x}^{2} + A_ {y}^{2}+ A_ {z}^{2} \right))[/tex]
|А|=[tex]\sqrt{5^{2}+7^{2}+4^{2} }[/tex]=[tex]\sqrt{25+49+16}[/tex]=√90
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Ответ:
[tex]{|A|}=\left (A_ {x}^{2} + A_ {y}^{2}+ A_ {z}^{2} \right))[/tex]
|А|=[tex]\sqrt{5^{2}+7^{2}+4^{2} }[/tex]=[tex]\sqrt{25+49+16}[/tex]=√90