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selenamalter

  • 2 years ago

which product is undefined?

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  1. selenamalter
    • 2 years ago
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  2. uri
    • 2 years ago
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    matrics?

  3. selenamalter
    • 2 years ago
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    yeah

  4. uri
    • 2 years ago
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    i don't get your question?

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

  6. uri
    • 2 years ago
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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?

  7. uri
    • 2 years ago
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    solve*

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

  9. amistre64
    • 2 years ago
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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. uri
    • 2 years ago
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    Okay wait :3

  11. amistre64
    • 2 years ago
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    |dw:1371047591398:dw|

  12. selenamalter
    • 2 years ago
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    so? BD ???

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

  14. amistre64
    • 2 years ago
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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

  15. giolefpatceid
    • 2 years ago
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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.

  16. uri
    • 2 years ago
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    It's BA.

  17. uri
    • 2 years ago
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    Option no.B

  18. amistre64
    • 2 years ago
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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

  19. amistre64
    • 2 years ago
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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

  20. giolefpatceid
    • 2 years ago
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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.

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