xitskaylee23
What is element a12 in matrix A



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xitskaylee23
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zzr0ck3r
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1st row, second column

hartnn
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\(\large a_{mn}\)
will give you m'th row and n'th column

xitskaylee23
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i dont understand what i am supposed to do!

hartnn
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can u indentify first row ?

hartnn
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*identify

xitskaylee23
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i dont even know what this is. i didnt even learn it so i literally have NO idea!

hartnn
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dw:1352781758000:dw

hartnn
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this representation of numbers is called Matrix representation.

hartnn
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in your question, [ 8 2 2 ]
is first row, got this ?

xitskaylee23
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yes

hartnn
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so can u tell me 2nd row ?

xitskaylee23
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2 6 3

hartnn
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absolutely correct :)
now 1st column ?

xitskaylee23
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8 2 9

hartnn
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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
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dw:1352782627935:dw

xitskaylee23
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2 2?

hartnn
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2 2 ?
there is only one element which is in first row and 2nd column

xitskaylee23
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i mean like 2nd row 2nd column

hartnn
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a12 means 1st row and 2nd column

xitskaylee23
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ohh

hartnn
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so which element is it ?

xitskaylee23
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i dont know i dont understand this!

hartnn
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dw:1352783049025:dw

xitskaylee23
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my options are:
–2
–3
5
2

hartnn
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see last drawing, did u get that ?

xitskaylee23
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yes

hartnn
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thats what i was trying to tell you, all this time....

redshift
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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

xitskaylee23
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ohmygod! really?

hartnn
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now did u understand how to find elements ?

xitskaylee23
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i think but can you help with more? i have 23% in algebra2

hartnn
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yes. but ask new question in new post ...