Help with understanding cramers rule

[pseudo notch]

hii! i forgot how to apply it im aware theres a matrix involved and im familiar with these basics as for the systm of linear equations, but as im checking the example we did in class i forgot why we applied it as such if anyone could help me out (i dont get why we did delta matrices and all the rest)

[swift pecan]

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[simple quiver]

Cramer's rule is applicable to determined systems. Let's represent the system as Ax = b.
Suppose you have n equations and n variables: x(1), ..., x(n). You construct (n + 1) determinants:
Δ - determinant of A.
Δ(k), k = 1, ..., n - determinant of A where the column number k is replaced with b.
Then:
x(k) = Δ(k)/Δ, k = 1, ..., n

[simple ice]

,rotate

[pseudo notch]

Ahhh i see thank you!

Where do you apply exactly the n+1?

[simple quiver]

What do you mean?

[pseudo notch]

Like when do i put it?😭

If you could elaborate more systematically 🥲

[simple quiver]

I don't understand what you mean.

What exactly do you mean by "apply n + 1"?

[prisma laurel]

@pseudo notch

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[pseudo notch]

+close

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