Question

Find a.b. a=[-2,3], b=[0.7, 1.2]

Answer 1

`a.b =2.2`

Explanation:

We are given the following in the question:

`a=\langle -2,3 \rangle, b=\langle 0.7, 1.2 \rangle`

We have to find the dot product.

Formula:

`a = \langle x_1,x_2\rangle\\b = \langle y_1.y_2\rangle\\a.b = x_1y_1 + x_2y_2`

Putting the corresponding values we get,

`a.b = (-2.(0.7)) + (3.(1.2))\\=-1.4+3.6\\=2.2`

`a.b =2.2`