anonymous
  • anonymous
Vector space/ vector subspace
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
ok if u are given a 2x2 matrix .. im curious wat type of question(possible questions ) is likely to come on this topic
xapproachesinfinity
  • xapproachesinfinity
the topic is broad, what are you interested to know about a 2x2 matrix
anonymous
  • anonymous
im not sure but but some how i think it will come for my test (anything)

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

caozeyuan
  • caozeyuan
like what are the typical problems your teach talked about in class?
caozeyuan
  • caozeyuan
Questions usually comes from problems discussed in so look at lecture notes is a good idea
anonymous
  • anonymous
well this is wat we did so far
anonymous
  • anonymous
@xapproachesinfinity
xapproachesinfinity
  • xapproachesinfinity
is that linear algebra?
anonymous
  • anonymous
yep
anonymous
  • anonymous
@amistre64
amistre64
  • amistre64
does that define G as a 2x2 matrix, whose element in 12 is the negative of 21 ?
anonymous
  • anonymous
idk does it?
amistre64
  • amistre64
they are your notes, im just trying to decipher them :)
anonymous
  • anonymous
well yea i think so
anonymous
  • anonymous
would that be an identity or something?
amistre64
  • amistre64
no, it just means if the element in 12 is say: 3, then the element in 21 is: -3
anonymous
  • anonymous
o ok
amistre64
  • amistre64
if we have 2 matrixes; a and b, those elements add to: (a+b) and (-a-b) (a+b) and -(a+b) are still opposites after addition
anonymous
  • anonymous
ok i see
anonymous
  • anonymous
so wat type of questions can i expect?
anonymous
  • anonymous
@amistre64
amistre64
  • amistre64
i wouldnt know
amistre64
  • amistre64
for my tests i just walked in and did the work for them ... never bothered with studying or worrying about what might be on it. i either knew it or i didnt :)
anonymous
  • anonymous
ok but if and identity question come do u know of any example
amistre64
  • amistre64
identity question, the identity element is an element of the set that after the operation an another element, returns the same element. a+0 = a, 0 is the identity element for addition a*1 = a, 1 is the identity element for multiplication AI= IA =A, the identity matrix is a matrix whose diagonal is all 1s and the rest are 0s
anonymous
  • anonymous
ok
amistre64
  • amistre64
im not sure what a good identity question would be tho
anonymous
  • anonymous
if u had this how would u find the identity for it \[\left[\begin{matrix}2 & 5 \\ 4 & 1\end{matrix}\right]\]
amistre64
  • amistre64
it is its own identity. you mean inverse?
amistre64
  • amistre64
one way to find an inverse to to row reduce it next to the identity matrix
amistre64
  • amistre64
2 5 1 0 --> 1 0 a b 4 1 0 1 --> 0 1 c d ab cd is therefore the inverse sought after
anonymous
  • anonymous
is that a 2x2 matrix
amistre64
  • amistre64
2 5 1 0 4 1 0 1 4 10 2 0 4 1 0 1 2 5 1 0 0 9 2 -1 1 5/2 1/2 0 0 9 2 -1 1 5/2 1/2 0 0 1 2/9 -1/9 1 5/2 1/2 0 0 -5/2 -5/9 5/18 1 0 -1/18 5/18 0 1 4/18 -2/18
amistre64
  • amistre64
its a 2x2 yes, but augmented into a 2x4 might be proper terminology
amistre64
  • amistre64
the other way to find the inverse of a 2x2 is by a memorized process swap a for d, negate b and c, and divide thru by the determinant 2 5 4 1 det = 2(1)-5(4) = -18, a=2,d=1, b=5,c=4 -1/18 5/18 4/18 -2/18 which is the same results as the other method
amistre64
  • amistre64
but this is inverse stuff, which im sure you meant to ask instead of identity stuff.
anonymous
  • anonymous
ok thanks

Looking for something else?

Not the answer you are looking for? Search for more explanations.