Question

Evaluate the dot product of (2,4) and (1,2)

Answer 1

-6

Explanation:

took test

Answer 2

The dot product is 10.

EXPLANATION

The given vectors are (2,4) and (1,2).

If we have the vectors

u=(a,b) and v=(c,d)

Then the dot product of the two vectors is given by

`u \bullet \: v = ac + bd`

This implies that,

`(2,4) \bullet(1,2) = 2 * 1 + 4 * 2`

This simplifies to;

`(2,4) \bullet(1,2) = 2 + 8 = 10`