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$$$\frac{2}{7}\cdot \left\langle 3, 1, 2\right\rangle$$$
您的输入
计算 $$$\frac{2}{7}\cdot \left\langle 3, 1, 2\right\rangle$$$。
解答
将向量的每个坐标乘以该标量：
$$${\color{DarkCyan}\left(\frac{2}{7}\right)}\cdot \left\langle 3, 1, 2\right\rangle = \left\langle {\color{DarkCyan}\left(\frac{2}{7}\right)}\cdot \left(3\right), {\color{DarkCyan}\left(\frac{2}{7}\right)}\cdot \left(1\right), {\color{DarkCyan}\left(\frac{2}{7}\right)}\cdot \left(2\right)\right\rangle = \left\langle \frac{6}{7}, \frac{2}{7}, \frac{4}{7}\right\rangle$$$
答案
$$$\frac{2}{7}\cdot \left\langle 3, 1, 2\right\rangle = \left\langle \frac{6}{7}, \frac{2}{7}, \frac{4}{7}\right\rangle\approx \left\langle 0.857142857142857, 0.285714285714286, 0.571428571428571\right\rangle$$$A
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