## xitskaylee23 3 years ago What is element a12 in matrix A

1. xitskaylee23

2. zzr0ck3r

1st row, second column

3. hartnn

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

4. xitskaylee23

i dont understand what i am supposed to do!

5. hartnn

can u indentify first row ?

6. hartnn

*identify

7. xitskaylee23

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

8. hartnn

|dw:1352781758000:dw|

9. hartnn

this representation of numbers is called Matrix representation.

10. hartnn

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

11. xitskaylee23

yes

12. hartnn

so can u tell me 2nd row ?

13. xitskaylee23

2 6 -3

14. hartnn

absolutely correct :) now 1st column ?

15. xitskaylee23

8 2 9

16. 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 ?

17. hartnn

|dw:1352782627935:dw|

18. xitskaylee23

2 2?

19. hartnn

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

20. xitskaylee23

i mean like 2nd row 2nd column

21. hartnn

a12 means 1st row and 2nd column

22. xitskaylee23

ohh

23. hartnn

so which element is it ?

24. xitskaylee23

i dont know i dont understand this!

25. hartnn

|dw:1352783049025:dw|

26. xitskaylee23

my options are: –2 –3 5 2

27. hartnn

see last drawing, did u get that ?

28. xitskaylee23

yes

29. hartnn

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

30. redshift

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

31. xitskaylee23

ohmygod! really?

32. hartnn

now did u understand how to find elements ?

33. xitskaylee23

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

34. hartnn

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