{rrr}{1}&{-16}&{19}{7}&{-6}&{13}{9}&{6}&{4} eching

$$\left| \begin{array} { r r r } { 1 } & { - 16 } & { 19 } \\ { 7 } & { - 6 } & { 13 } \\ { 9 } & { 6 } & { 4 } \end{array} \right|$$

Baholash

$$298$$

Sarrus qoidasidan foydalanish qadamlari

Diagonal usulidan foydalanib matritsaning aniqlovchisini topish.

$$det(\left(\begin{matrix}1&-16&19\\7&-6&13\\9&6&4\end{matrix}\right))$$

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

$$\left(\begin{matrix}1&-16&19&1&-16\\7&-6&13&7&-6\\9&6&4&9&6\end{matrix}\right)$$

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

$$-6\times 4-16\times 13\times 9+19\times 7\times 6=-1098$$

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

$$9\left(-6\right)\times 19+6\times 13+4\times 7\left(-16\right)=-1396$$

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

$$-1098-\left(-1396\right)$$

-1098 dan -1396 ni ayirish.

$$298$$

Ikkilamchilar bilan kengayishdan foydalanish qadamlari

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

$$det(\left(\begin{matrix}1&-16&19\\7&-6&13\\9&6&4\end{matrix}\right))$$

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.

$$det(\left(\begin{matrix}-6&13\\6&4\end{matrix}\right))-\left(-16det(\left(\begin{matrix}7&13\\9&4\end{matrix}\right))\right)+19det(\left(\begin{matrix}7&-6\\9&6\end{matrix}\right))$$

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

$$-6\times 4-6\times 13-\left(-16\left(7\times 4-9\times 13\right)\right)+19\left(7\times 6-9\left(-6\right)\right)$$

Qisqartirish.

$$-102-\left(-16\left(-89\right)\right)+19\times 96$$

Yakuniy natija olish uchun shartlarni qo'shish.

$$298$$

Omil

$$2\times 149$$