MCQ
For every point P(x, y, z) on the xy-plane,
- Ax = 0
- By = 0
- Cz = 0
- Dx = y = z = 0
Solution:
The Z-coordinate of every point on the XY-plane is zero.
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$(A)$ $|\overrightarrow{ a }+\lambda \overrightarrow{ c }| \geq|\overrightarrow{ a }|$ for all $\lambda \in R$.
$(B)$ $\overrightarrow{ a }$ and $\overrightarrow{ c }$ are always parallel