anonymous
  • anonymous
What is element a12 in matrix A
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
1 Attachment
zzr0ck3r
  • zzr0ck3r
1st row, second column
hartnn
  • hartnn
\(\large a_{mn}\) will give you m'th row and n'th column

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anonymous
  • anonymous
i dont understand what i am supposed to do!
hartnn
  • hartnn
can u indentify first row ?
hartnn
  • hartnn
*identify
anonymous
  • anonymous
i dont even know what this is. i didnt even learn it so i literally have NO idea!
hartnn
  • hartnn
|dw:1352781758000:dw|
hartnn
  • hartnn
this representation of numbers is called Matrix representation.
hartnn
  • hartnn
in your question, [ 8 -2 -2 ] is first row, got this ?
anonymous
  • anonymous
yes
hartnn
  • hartnn
so can u tell me 2nd row ?
anonymous
  • anonymous
2 6 -3
hartnn
  • hartnn
absolutely correct :) now 1st column ?
anonymous
  • anonymous
8 2 9
hartnn
  • hartnn
right, means you are getting this :) now a12 is the element in 1st row and 2nd column can u find which element is it ?
hartnn
  • hartnn
|dw:1352782627935:dw|
anonymous
  • anonymous
2 2?
hartnn
  • hartnn
2 2 ? there is only one element which is in first row and 2nd column
anonymous
  • anonymous
i mean like 2nd row 2nd column
hartnn
  • hartnn
a12 means 1st row and 2nd column
anonymous
  • anonymous
ohh
hartnn
  • hartnn
so which element is it ?
anonymous
  • anonymous
i dont know i dont understand this!
hartnn
  • hartnn
|dw:1352783049025:dw|
anonymous
  • anonymous
my options are: –2 –3 5 2
hartnn
  • hartnn
see last drawing, did u get that ?
anonymous
  • anonymous
yes
hartnn
  • hartnn
thats what i was trying to tell you, all this time....
anonymous
  • anonymous
look at it this way: circle the first row and the 2nd column: |dw:1352783074995:dw| whichever you've circled twice is the element you're looking for
anonymous
  • anonymous
ohmygod! really?
hartnn
  • hartnn
now did u understand how to find elements ?
anonymous
  • anonymous
i think but can you help with more? i have 23% in algebra2
hartnn
  • hartnn
yes. but ask new question in new post ...

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