Ответ:
√22
Объяснение:
A(1;3;4) B(3;7;6) C(2;-3;5)
AC={2-1; -3-3; 5-4}={1; -6; 1}
2AC={2·1; 2·(-6); 2·1}={2; -12; 2}
BC={2-3; -3-7; 5-6}={-1; -10; -1}
2AC-BC={2-(-1); -12-(-10); 2-(-1)}={3; -2; 3}
|2AC-BC|=√(3²+(-2)²+3²)=√(9+4+9)=√22
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Ответ:
√22
Объяснение:
A(1;3;4) B(3;7;6) C(2;-3;5)
AC={2-1; -3-3; 5-4}={1; -6; 1}
2AC={2·1; 2·(-6); 2·1}={2; -12; 2}
BC={2-3; -3-7; 5-6}={-1; -10; -1}
2AC-BC={2-(-1); -12-(-10); 2-(-1)}={3; -2; 3}
|2AC-BC|=√(3²+(-2)²+3²)=√(9+4+9)=√22