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kritima

  • 2 years ago

show that :I b^2+c^2 a^2 a^2 I I b^2 c^2+a^2 b^2 I I c^2 c^2 a^2+b^2 I =4a^2b^2c^2 where I ... I is a sign of determinant

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  1. kritima
    • 2 years ago
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    can we do something like R1-R2-R3

  2. kritima
    • 2 years ago
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    |dw:1332770725462:dw|

  3. kritima
    • 2 years ago
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    question is something like |dw:1332771115290:dw|

  4. y2o2
    • 2 years ago
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    does the determinant look like this ?!

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  5. kritima
    • 2 years ago
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    yes

  6. kritima
    • 2 years ago
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    i think after R1-R2-R3 we can take -2 common from R1 then R2-R1 and again R3-R1

  7. kritima
    • 2 years ago
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    i can't go further after this so do you have any idea?

  8. y2o2
    • 2 years ago
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    No, not yet

  9. kritima
    • 2 years ago
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    now i got it

  10. kritima
    • 2 years ago
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    |dw:1332772038295:dw|

  11. kritima
    • 2 years ago
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    but i still want you to check out for me

  12. kritima
    • 2 years ago
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    i don"t think my process is right

  13. y2o2
    • 2 years ago
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    i solved it

  14. y2o2
    • 2 years ago
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    1) R1+R3 2) R1-R2 3) take 2 as a common factor from R1 4) R3-R1 5)R2-R3 "you will find 3 Zero's in the determinant" 6) find the value of the final determinant and you'll get the answer

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spraguer (Moderator)
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