91影视

The vector has three components. These three components are the unit cut by the vector on x, y and z axis. The vector components can be represented by the following manner.

Let the vector is r, then the vector component of the vector r will be,

Where,${\mathrm{r}}_{\mathrm{x}}\mathrm{is}\mathrm{x}\mathrm{axis}\mathrm{unit},{\mathrm{r}}_{\mathrm{y}}\mathrm{is}\mathrm{y}\mathrm{axis}\mathrm{unit},{\mathrm{r}}_{\mathrm{z}}\mathrm{is}\mathrm{z}\mathrm{component}\mathrm{unit}$.

All the vectors have zero z component here because the z dimension is absent. The component for the vector a covering the 4 unit of x axis and 3 unit of y axis in 3rd coordination centre of the graph hence the component of the vector.

All the vectors have zero z component here because the z dimension is absent. The component for the vector b covering the 4 unit of x axis and 3 unit of y axis in 3rd coordination centre of the graph hence the component of the vector .

Vector and the vector . Both the vector components are equal hence statement$\stackrel{鈫�}{a}=\stackrel{鈫�}{b}$ is true.

All the vectors have zero z component here because the z dimension is absent. The component for the vector c covering the 4 unit of x axis and 3 unit of y axis in 4th coordination centre of the graph hence the component of the vector .

Vector and the vector . Both the vector components are just opposite to each other hence statement $\stackrel{鈫�}{c}=-\stackrel{鈫�}{a}$ is true.

All the vectors have zero z component here because the z dimension is absent. The component for the vector d covering the 3 unit of x axis in 4th and 4 unit of y axis in 1st coordination centre of the graph hence the component of the vector .

Vector and the vector . Both the vector components are not opposite to each other hence statement$\stackrel{鈫�}{d}=-\stackrel{鈫�}{c}$ is false.