{ccc}{3}&{-2}&{4}{2}&{-4}&{5}{1}&{8}&{2} eching

$$\left( \begin{array} { c c c } { 3 } & { - 2 } & { 4 } \\ { 2 } & { - 4 } & { 5 } \\ { 1 } & { 8 } & { 2 } \end{array} \right)$$

Determinantni hisoblash

$$-66$$

Sarrus qoidasidan foydalanish qadamlari

Diagonal usulidan foydalanib matritsaning aniqlovchisini topish.

$$det(\left(\begin{matrix}3&-2&4\\2&-4&5\\1&8&2\end{matrix}\right))$$

Birinchi ikki ustunni to'rtinchi va beshinchi ustun sifatida qaytarish uchun asl matritsani kengaytirish.

$$\left(\begin{matrix}3&-2&4&3&-2\\2&-4&5&2&-4\\1&8&2&1&8\end{matrix}\right)$$

Pastki chap kiritmadan boshlab diagonal kamayish tarafga ko'paytirish ha koʻpaytmalarni qo'shish.

$$3\left(-4\right)\times 2-2\times 5+4\times 2\times 8=30$$

Pastki chap kiritmadan boshlab diagonal ko'payish tarafga koʻpaytirish va koʻpaytmalarni qoʻshish.

$$-4\times 4+8\times 5\times 3+2\times 2\left(-2\right)=96$$

Kamayib boruvchi diagonal koʻpaytmalarning yig'indisidan ko'payib boruvchi diagonal koʻpaytmalar yig'indisini ayirish.

$$30-96$$

30 dan 96 ni ayirish.

$$-66$$

Ikkilamchilar bilan kengayishdan foydalanish qadamlari

Kichik a'zolarni kengaytirish usulidan foydalanib matritsaning aniqlovchisini topish (ko'paytiruvchilarni kengaytirish deb ham nomlanadi).

$$det(\left(\begin{matrix}3&-2&4\\2&-4&5\\1&8&2\end{matrix}\right))$$

Kichik a’zolarga kengaytirish uchun birinchi satrning har bir elementini o‘zining kichik a’zosiga ko‘paytiring, qaysiki ana shu elementga ega bo‘lgan satr va ustunni yo‘q qilish orqali yaratilgan 2\times 2 matritsasining maxraji hisoblanadi, so‘ngra elementning joylashuv belgisiga ko‘paytiring.

$$3det(\left(\begin{matrix}-4&5\\8&2\end{matrix}\right))-\left(-2det(\left(\begin{matrix}2&5\\1&2\end{matrix}\right))\right)+4det(\left(\begin{matrix}2&-4\\1&8\end{matrix}\right))$$

\left(\begin{matrix}a&b\\c&d\end{matrix}\right) 2\times 2 matritsasi uchun, determinant ad-bc.

$$3\left(-4\times 2-8\times 5\right)-\left(-2\left(2\times 2-5\right)\right)+4\left(2\times 8-\left(-4\right)\right)$$

Qisqartirish.

$$3\left(-48\right)-\left(-2\left(-1\right)\right)+4\times 20$$

Yakuniy natija olish uchun shartlarni qo'shish.

$$-66$$

Baholash

$$\left(\begin{matrix}3&-2&4\\2&-4&5\\1&8&2\end{matrix}\right)$$