## Question

True or False?

If a point belongs to both the xy-plane and the xz-plane, then the point lies on the x-axis.

If a point belongs to the xy-plane then its z-component equals 0.
If a point belongs to the xz-plane then its y-component equals 0.
Thus, point has form (x_0,0,0). This means that it lies on the x-axis.