Question

If $\overrightarrow{a}=\hat{i}-3\hat{j}+\alpha\hat{k}, \overrightarrow{b}=\hat{i}-2\hat{j}+4\hat{k}\ and\ \overrightarrow{a}\times\overrightarrow{b}=-2\hat{i}+\hat{j}+\beta\hat{k}$, then the value of $\beta$ is equal to

• A. -2
• B. 2
• C. -1
• D. 1
• E. -3

Answer 1

Answer: (D)

1

Answer 2

The correct option is (D): 1