三维向量基本运算
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Vector3D a(x,y,z);
|a| = √(x^2 + y^2 + z^2);
λa = (λx_1, λy_1, λz_1);
✕
三维向量基本运算
--------------------------
Vector3D a(x,y,z);
|a| = √(x^2 + y^2 + z^2);
λa = (λx_1, λy_1, λz_1);
