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selenamalter

which product is undefined?

  • 10 months ago
  • 10 months ago

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  1. selenamalter
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    • 10 months ago
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  2. uri
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    matrics?

    • 10 months ago
  3. selenamalter
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    yeah

    • 10 months ago
  4. uri
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    i don't get your question?

    • 10 months ago
  5. selenamalter
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    A. AB B. BA C. DB D. CD would these help

    • 10 months ago
  6. uri
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    wait so like you're asking me to slove all this and tell you from this which one's are impossibe?

    • 10 months ago
  7. uri
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    solve*

    • 10 months ago
  8. selenamalter
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    I think so :/ you see, the problem is, i dont know how to do it

    • 10 months ago
  9. amistre64
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    matrix multiplication requires that the number of columns in the first one, matches the number of rows in the second one

    • 10 months ago
  10. uri
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    Okay wait :3

    • 10 months ago
  11. amistre64
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    |dw:1371047591398:dw|

    • 10 months ago
  12. selenamalter
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    so? BD ???

    • 10 months ago
  13. amistre64
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    does B have a different number of columns then D has rows?

    • 10 months ago
  14. amistre64
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    essentially, we need to be able to pair up vectors|dw:1371047676408:dw| if we cant pair up the vectors, we can perform the operations

    • 10 months ago
  15. giolefpatceid
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    For each multiplication, count the number of columns for the first table and the number of rows for the second table. If they are equal, the multiplication is valid. Otherwise the product it is undefined.

    • 10 months ago
  16. uri
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    It's BA.

    • 10 months ago
  17. uri
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    Option no.B

    • 10 months ago
  18. amistre64
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    if we notate this in row,column format A=3,2 B=2,2 C=3,1 D=1,2 (r,c)(r,c) | | these numbers have to equal

    • 10 months ago
  19. amistre64
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    CD = 3,1 1,2 is valid DB = 1,2 2,2 is valid AB = 3,2 2,2 is valid BB = 2,2 2,2 is valid i think thats all the valid ones

    • 10 months ago
  20. giolefpatceid
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    For the AB multiplication. A has 2 columns, B has 2 rows, so the multiplication is valid. You do the same thing for the rest.

    • 10 months ago
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