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lara31 [8.8K]
3 years ago
12

Forgot to add attachment :'> ight 7th grade math 25 points each thank you

Mathematics
1 answer:
ad-work [718]3 years ago
7 0

Answer:

-7 and -5

Step-by-step explanation:

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3 years ago
If the value of third order determinant is 11. Then what is the value of the determinant formed by its cofactors.
nordsb [41]

Answer:

146.41

Step-by-step explanation:

third order determinant = determinant of 3×3 matrix A

given ∣A∣=11

det (cofactor matrix of A) =set (transpare of cofactor amtrix of A) (transpare does not change the det)

=det(adjacent of A)

{det (cofactor matrix of A)}  ^2  = {det (adjacent of A)} ^2

 

(Using for an n×n det (cofactor matrix of A)=det (A)^n−1 )

we get

det (cofactor matrix of A)^2  = {det(A)  ^3−1 }^2

 

=(11)^2×2  = 11^4

 =146.41

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3 years ago
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OlgaM077 [116]

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Step-by-step explanation:

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