Contoh Kasus yang diselesaikan LIPI​

Jawaban:

kamu

Penjelasan:

maaf kalo salah semoga benar

Terdapat dua matriks:

[tex]A=\left(\begin{array}{ccc}2&-3&1\\-4&0&2\end{array}\right)\\B=\left(\begin{array}{cc}1&-5\\-2&4\\3&6\end{array}\right)[/tex]

Hasil dari perkalian skalar dan perkalian matriks: -2AB adalah sebagai berikut:

[tex]\left(\begin{array}{cc}\bf-22&\bf32\\\bf-4&\bf-64\end{array}\right)[/tex] (b)

Diketahui:

[tex]A=\left(\begin{array}{ccc}2&-3&1\\-4&0&2\end{array}\right)\\B=\left(\begin{array}{cc}1&-5\\-2&4\\3&6\end{array}\right)[/tex]

Ditanya: -2AB

Jawab:

• Perkalian skalar

[tex]-2A=-2\left(\begin{array}{ccc}2&-3&1\\-4&0&2\end{array}\right)=\left(\begin{array}{ccc}-2\cdot2&-2\cdot(-3)&-2\cdot1\\-2\cdot(-4)&-2\cdot0&-2\cdot2\end{array}\right)=\left(\begin{array}{ccc}-4&6&-2\\8&0&-4\end{array}\right)[/tex]

• Perkalian matriks

[tex]-2AB=\left(\begin{array}{ccc}-4&6&-2\\8&0&-4\end{array}\right)\left(\begin{array}{cc}1&-5\\-2&4\\3&6\end{array}\right)\\=\left(\begin{array}{cc}-4\cdot1+6\cdot(-2)-2\cdot3&-4\cdot(-5)+6\cdot4-2\cdot6\\8\cdot1+0\cdot(-2)-4\cdot3&8\cdot(-5)+0\cdot4-4\cdot6\end{array}\right)\\=\left(\begin{array}{cc}-4-12-6&20+24-12\\8+0-12&-40+0-24\end{array}\right)\\=\left(\begin{array}{cc}-22&32\\-4&-64\end{array}\right)[/tex]

(b)

Materi tentang Konsep Syarat Perkalian Matriks pada https://brainly.co.id/tugas/7347142

#BelajarBersamaBrainly

#SPJ1

Penjelasan dengan langkah-langkah:

a)

= 25.000

= 25 × 1.000

= 2,5 × 10 × 1.000

= 2,5 × 10¹ × 10³

= 2,5 × 10⁴

b)

= 550.000

= 55 × 10.000

= 5,5 × 10 × 10.000

= 5,5 × 10¹ × 10⁴

= 5,5 × 10⁵

c)

= 80.000.000

= 8 × 10.000.000

= 8 × 10⁷

d)

= 0,0002

= 0,2 × 10⁻³

= 2 × 10⁻¹ × 10⁻³

= 2 × 10⁻⁴

e)

= 0,000316

= 0,316 × 10⁻³

= 3,16 × 10⁻¹ × 10⁻³

= 3,16 × 10⁻⁴

f)

= 0,00443

= 0,443 × 10⁻²

= 4,43 × 10⁻¹ × 10⁻²

= 4,43 × 10⁻³

g)

= 0,000000013

= 0,13 × 10⁻⁷

= 1,3 × 10⁻¹ × 10⁻⁷

= 1,3 × 10⁻⁸

h)

= 240.000.000.000

= 24 × 10¹⁰

= 2,4 × 10¹ × 10¹⁰

= 2,4 × 10¹¹

i)

= 0,00001004955

= 0,1004955 × 10⁻⁴

= 1,004955 × 10⁻¹ × 10⁻⁴

= 1,004955 × 10⁻⁵

Jawaban:

a.

Penjelasan:

krn tertulis di sana

banyak di situ