For vec a = (2, 3) and vec b = (-1, 4), find 2 vec a - vec b.

For $a = (2, 3)$ and $b = (- 1, 4)$ , find $2 a - b$ .

Free questions with an explanation for every one, and full timed Sultan Qaboos University Foundation & Aptitude Test mock tests.

For $a = (3, 2)$ and $b = (- 4, 2)$ , find $a \cdot b$ .
For $a = (2, 5)$ and $b = (0, - 1)$ , find $a \cdot b$ .
For $a = (4, - 1)$ and $b = (- 1, - 2)$ , find $a \cdot b$ .
For $a = (- 2, 3)$ and $b = (- 4, - 2)$ , find $a \cdot b$ .
For $a = (- 5, 1)$ and $b = (2, - 5)$ , find $a \cdot b$ .
For $a = (4, 3)$ and $b = (4, - 4)$ , find $a \cdot b$ .