Question

If u = <5, -4>, find u · u.

3


9

sqrt(41)

41

Answer 1

@Michele_Laino

Answer 2

I dont think there is a V

Answer 3

\[<5,-4> \cdot <5, -4> \implies <5 * 5+ (-4) * (-4)>\]

Answer 4

That's the dot product

Answer 5

we have, by definition:
\[u \cdot u = 5 \times 5 + \left( { - 4} \right) \times \left( { - 4} \right) = ...?\]

Answer 6

I got a 25 and a 16

Answer 7

and thas a 41

Answer 8

Yup