Iklan

Pertanyaan

Jika a = 2 i − 4 j ​ merupakan invers dari vektor b , maka tentukan vektor satuan dari !

Jika  merupakan invers dari vektor , maka tentukan vektor satuan dari undefined!

Ikuti Tryout SNBT & Menangkan E-Wallet 100rb

Habis dalam

02

:

20

:

39

:

05

Klaim

Iklan

D. Enty

Master Teacher

Jawaban terverifikasi

Pembahasan

Pembahasan
lock

Jika merupakan invers dari vektor , maka: Sehingga vektor satuan dari :

Jika begin mathsize 14px style a with rightwards arrow on top equals 2 i with rightwards arrow on top minus 4 j with rightwards arrow on top end style merupakan invers dari vektor begin mathsize 14px style b with rightwards arrow on top end style, maka:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell a with rightwards harpoon with barb upwards on top end cell equals cell open parentheses table row 2 row cell negative 4 end cell end table close parentheses end cell row cell b with rightwards arrow on top end cell equals cell negative a with rightwards arrow on top end cell row cell b with rightwards harpoon with barb upwards on top end cell equals cell negative open parentheses table row 2 row cell negative 4 end cell end table close parentheses end cell row cell b with rightwards harpoon with barb upwards on top end cell equals cell open parentheses table row cell negative 2 end cell row 4 end table close parentheses end cell end table end style

Sehingga vektor satuan dari begin mathsize 14px style b with rightwards arrow on top end style:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell e subscript b with rightwards arrow on top end subscript end cell equals cell fraction numerator 1 over denominator open vertical bar b with rightwards arrow on top close vertical bar end fraction times b with rightwards arrow on top end cell row cell e subscript b with rightwards arrow on top end subscript end cell equals cell fraction numerator 1 over denominator square root of open parentheses negative 2 close parentheses squared plus open parentheses 4 close parentheses squared end root end fraction times open parentheses table row cell negative 2 end cell row 4 end table close parentheses end cell row cell e subscript b with rightwards arrow on top end subscript end cell equals cell fraction numerator 1 over denominator square root of 4 plus 16 end root end fraction times open parentheses table row cell negative 2 end cell row 4 end table close parentheses end cell row cell e subscript b with rightwards arrow on top end subscript end cell equals cell fraction numerator 1 over denominator square root of 20 end fraction times open parentheses table row cell negative 2 end cell row 4 end table close parentheses end cell row cell e subscript b with rightwards arrow on top end subscript end cell equals cell fraction numerator 1 over denominator 2 square root of 5 end fraction cross times fraction numerator square root of 5 over denominator square root of 5 end fraction times open parentheses table row cell negative 2 end cell row 4 end table close parentheses end cell row cell e subscript b with rightwards arrow on top end subscript end cell equals cell 1 over 10 square root of 5 times open parentheses table row cell negative 2 end cell row 4 end table close parentheses end cell row cell e subscript b with rightwards arrow on top end subscript end cell equals cell open parentheses table row cell negative 2 over 10 square root of 5 end cell row cell 4 over 10 square root of 5 end cell end table close parentheses end cell row cell e subscript b with rightwards arrow on top end subscript end cell equals cell open parentheses table row cell negative 1 fifth square root of 5 end cell row cell 2 over 5 square root of 5 end cell end table close parentheses end cell end table end style

Perdalam pemahamanmu bersama Master Teacher
di sesi Live Teaching, GRATIS!

2

Iklan

Pertanyaan serupa

Pada gambar di bawah ini, sisi-sisi AF , FE dari suatu segi enam beraturan ABCDEF mewakili dua buah vektor . Berdasarkan gambar, nyatakan dalam dan b , vektor-vektor yang diwakili oleh DF .

3

5.0

Jawaban terverifikasi

RUANGGURU HQ

Jl. Dr. Saharjo No.161, Manggarai Selatan, Tebet, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12860

Coba GRATIS Aplikasi Roboguru

Coba GRATIS Aplikasi Ruangguru

Download di Google PlayDownload di AppstoreDownload di App Gallery

Produk Ruangguru

Hubungi Kami

Ruangguru WhatsApp

+62 815-7441-0000

Email info@ruangguru.com

[email protected]

Contact 02140008000

02140008000

Ikuti Kami

©2024 Ruangguru. All Rights Reserved PT. Ruang Raya Indonesia