Question

Simplification Question:

Answer 1

why are these equal\[-2(1,1) \times \frac{ 1 }{\sqrt{2} }(1,1,)=-\sqrt{2}(1+1)=-2\sqrt{2}\]?

Answer 2

thats not dot product

Answer 3

multiplication

Answer 4

What are the commas?

Answer 5

those are vectors. disregard the comma with no number behind it. thats a typo

Answer 6

@Hero

Answer 7

Oh, okay.
For matrices?

Answer 8

oh! that is a dot product of the two vector one is u and other is grad(f)

Answer 9

@camoJAX

Answer 10

yes

Answer 11

i figured it out but i have it in a different layout. can you answer my other question though. i think i know the answer but am not sure. its kinda simple

Answer 12

ok