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Imtiaz7

  • one year ago

Help Please...!

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  1. Imtiaz7
    • one year ago
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    Reduce following matrix into Reduce Echlon Form:|dw:1439303190612:dw|

  2. Imtiaz7
    • one year ago
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    @UsukiDoll

  3. anonymous
    • one year ago
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    @pooja195

  4. anonymous
    • one year ago
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    Oooh... the matrix :>

  5. anonymous
    • one year ago
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    \[\Large \left[\begin{matrix}1&-1&2&1\\5&0&4&2\\4&1&2&0\\1&1&1&1\end{matrix}\right|\left.\begin{matrix}1\\3\\1\\0\end{matrix}\right]\]

  6. anonymous
    • one year ago
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    I'm awesome :)

  7. anonymous
    • one year ago
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    What did you try?

  8. anonymous
    • one year ago
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    @Imtiaz7

  9. Imtiaz7
    • one year ago
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    I try but couldnt get right answer

  10. anonymous
    • one year ago
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    That's because you don't use magic :D

  11. Imtiaz7
    • one year ago
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    will you teach me magic :D

  12. anonymous
    • one year ago
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    Well, let's see now: Add the first row to the third \[\Large \left[\begin{matrix}1&-1&2&1\\5&0&4&2\\5&0&4&1\\1&1&1&1\end{matrix}\right|\left.\begin{matrix}1\\3\\2\\0\end{matrix}\right] \]

  13. anonymous
    • one year ago
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    Any suggestions from you?

  14. Imtiaz7
    • one year ago
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    Can you tell me why?

  15. anonymous
    • one year ago
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    Well, look what happened? It looks nice :D You can easily subtract the second row from the third, and get something simple... \[\Large \left[\begin{matrix}1&-1&2&1\\5&0&4&2\\0&0&0&-1\\1&1&1&1\end{matrix}\right|\left.\begin{matrix}1\\3\\-1\\0\end{matrix}\right] \]

  16. Imtiaz7
    • one year ago
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    how the first element of third row becomes zero

  17. anonymous
    • one year ago
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    Subtracted the second row from the third? 5 - 5 = 0

  18. Imtiaz7
    • one year ago
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    Okay

  19. anonymous
    • one year ago
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    We can add the third row to the first and fourth row to get \[\Large \left[\begin{matrix}1&-1&2&0\\5&0&4&2\\0&0&0&-1\\1&1&1&0\end{matrix}\right|\left.\begin{matrix}0\\3\\-1\\-1\end{matrix}\right] \]

  20. Imtiaz7
    • one year ago
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    ok..

  21. anonymous
    • one year ago
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    Also add twice the third row to the second row \[\Large \left[\begin{matrix}1&-1&2&0\\5&0&4&0\\0&0&0&-1\\1&1&1&0\end{matrix}\right|\left.\begin{matrix}0\\1\\-1\\-1\end{matrix}\right] \] Maybe you should work out the rest. It's much simpler now ^.^

  22. Imtiaz7
    • one year ago
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    okay thnaks :)

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