Bantu jawab ya....yg Ngasal REPORT!!

Bantu jawab ya….yg Ngasal REPORT!!

Nomor 1

$begin{align} A + B &= begin{pmatrix} -2 & 4 & -6 \ 0 & 5 & 8 end{pmatrix} + begin{pmatrix} 2 & 6 & 8 \ 1 & 4 & 10 end{pmatrix} \ &= begin{pmatrix} 0 & 10 & 2 \ 1 & 9 & 18 end{pmatrix} \ B - A &= begin{pmatrix} 2 & 6 & 8 \ 1 & 4 & 10 end{pmatrix} - begin{pmatrix} -2 & 4 & -6 \ 0 & 5 & 8 end{pmatrix} \&= begin{pmatrix} 4 & 2 & 14 \ 1 & -1 & 2 end{pmatrix} end{align}$

Nomor 2

$begin{align} begin{pmatrix} 2 & -2 \ -5 & 6 end{pmatrix} cdot begin{pmatrix} 3 \ 4 end{pmatrix} &= begin{pmatrix} 6 + (-8) \ -15 + 24 end{pmatrix} \ &= begin{pmatrix} -2 \ 9 end{pmatrix} end{align}$

Nomor 3

$begin{align} det A &= (2)(5) - (-3)(-4) \ &= 10 - 12 \ &= -2 end{align}$

Nomor 4

$begin{align} B^{-1} &= frac{1}{det B} operatorname{adj} B \ &= frac{1}{(5)(12) - (9)(8)} begin{pmatrix} 12&-9 \ -8&5 end{pmatrix} \ &= -frac{1}{12} begin{pmatrix} 12&-9 \ -8&5 end{pmatrix} \ &= begin{pmatrix} -1&frac{3}{4} \ frac{2}{3} & -frac{5}{12} end{pmatrix} end{align}$

Cabang:

Aljabar