Question

Does anyone know how to solve this?

Answer 1

The correct option is c.

Explanation:

Given that,

u = 7i+4j and v = 2i-3j

We need to find the product of u and v. The dot product of two vectors is given by :

`u{\cdot}v=(7i+4j){\cdot} (2i-3j)\\\\=(7i)(2i)+(4j)(-3j)\\\\=14-12\\\\=2`

So, the dot product of u and v is equal to 2.