Question

In the figure, $\vec{a}$ be the position vector of the point $A$ with respect to the origin $O$. $l$ is a line parallel to a vector $\vec{b}$. The vector equation of line $l$ is

• A. $\vec{r}=\lambda\left(\vec{a}\times \vec{b}\right)$
• B. $\vec{r}=\lambda \vec{a}-\vec{b}$
• C. $\vec{r}=\vec{a}+\lambda\vec{b}$
• D. $\vec{r}=\lambda\left(\vec{a}\cdot\vec{b}\right)$

Answer 1

Answer: (C)

Correct answer is (c) $\vec{r}=\vec{a}+\lambda\vec{b}$