Iklan

Iklan

Pertanyaan

Jika a = 3 i + 4 j ​ − 5 k , b = i + 2 j ​ − 3 k dan c = − i + 2 j ​ + 3 2 ​ k , maka vektor satuan d = a − 2 b + 3 c adalah ...

Jika , dan , maka vektor satuan adalah ...

  1. 2 over 7 straight i with rightwards arrow on top minus 6 over 7 straight j with rightwards arrow on top minus 3 over 7 straight k with rightwards arrow on top

  2. negative 2 over 7 straight i with rightwards arrow on top plus 6 over 7 straight j with rightwards arrow on top plus 3 over 7 straight k with rightwards arrow on top

  3. negative 2 straight i with rightwards arrow on top plus 6 straight j with rightwards arrow on top plus 3 straight k with rightwards arrow on top

  4. 2 straight i with rightwards arrow on top minus 6 straight j with rightwards arrow on top minus 3 straight k with rightwards arrow on top

  5. negative 2 over 5 straight i with rightwards arrow on top plus 6 over 5 straight j with rightwards arrow on top plus 3 over 5 straight k with rightwards arrow on top

Iklan

R. Hajrianti

Master Teacher

Mahasiswa/Alumni Universitas Pendidikan Indonesia

Jawaban terverifikasi

Jawaban

jawaban yang benar adalah B.

jawaban yang benar adalah B.

Iklan

Pembahasan

Vektor satuan dari vektor tiga dimensi adalah sebagai berikut. . Sebelum mencari vektor satuan dari , hitunglah operasi vektornya terlebih dahulu, yaitu: Selanjutnya, vektor satuan adalah: Dengan demikian, jawaban yang benar adalah B.

Vektor satuan dari vektor tiga dimensi straight a with rightwards arrow on top equals open parentheses table row cell straight a subscript 1 end cell row cell straight a subscript 2 end cell row cell straight a subscript 3 end cell end table close parentheses adalah sebagai berikut.

fraction numerator straight a with rightwards arrow on top over denominator open vertical bar straight a with rightwards arrow on top close vertical bar end fraction equals fraction numerator open parentheses straight a subscript 1 comma space straight a subscript 2 comma space straight a subscript 3 close parentheses over denominator square root of straight a subscript 1 squared plus straight a subscript 2 squared plus straight a subscript 3 squared end root end fraction.

Sebelum mencari vektor satuan dari straight d with rightwards arrow on top, hitunglah operasi vektornya terlebih dahulu, yaitu:

table attributes columnalign right center left columnspacing 0px end attributes row cell straight d with rightwards arrow on top end cell equals cell straight a with rightwards arrow on top minus 2 straight b with rightwards arrow on top plus 3 straight c with rightwards arrow on top end cell row cell straight d with rightwards arrow on top end cell equals cell open parentheses table row 3 row 4 row cell negative 5 end cell end table close parentheses minus 2 open parentheses table row 1 row 2 row cell negative 3 end cell end table close parentheses plus 3 open parentheses table row cell negative 1 end cell row 2 row cell begin inline style 2 over 3 end style end cell end table close parentheses end cell row cell straight d with rightwards arrow on top end cell equals cell open parentheses table row 3 row 4 row cell negative 5 end cell end table close parentheses minus open parentheses table row 2 row 4 row cell negative 6 end cell end table close parentheses plus open parentheses table row cell negative 3 end cell row 6 row 2 end table close parentheses end cell row cell straight d with rightwards arrow on top end cell equals cell open parentheses table row cell 3 minus 2 minus 3 end cell row cell 4 minus 4 plus 6 end cell row cell negative 5 plus 6 plus 2 end cell end table close parentheses end cell row cell straight d with rightwards arrow on top end cell equals cell open parentheses table row cell negative 2 end cell row 6 row 3 end table close parentheses end cell end table 

Selanjutnya, vektor satuan straight d with rightwards arrow on top adalah:

table attributes columnalign right center left columnspacing 0px end attributes row cell fraction numerator straight d with rightwards arrow on top over denominator open vertical bar straight d with rightwards arrow on top close vertical bar end fraction end cell equals cell fraction numerator open parentheses negative 2 comma space 6 comma space 3 close parentheses over denominator square root of open parentheses negative 2 close parentheses squared plus 6 squared plus 3 squared end root end fraction end cell row blank equals cell fraction numerator open parentheses negative 2 comma space 6 comma space 3 close parentheses over denominator square root of 4 plus 36 plus 9 end root end fraction end cell row blank equals cell fraction numerator open parentheses negative 2 comma space 6 comma space 3 close parentheses over denominator square root of 49 end fraction end cell row blank equals cell fraction numerator open parentheses negative 2 comma space 6 comma space 3 close parentheses over denominator 7 end fraction end cell row blank equals cell open parentheses negative 2 over 7 comma space 6 over 7 comma space 3 over 7 close parentheses end cell row blank equals cell negative 2 over 7 straight i with rightwards arrow on top plus 6 over 7 straight j with rightwards arrow on top plus 3 over 7 straight k with rightwards arrow on top end cell end table

Dengan demikian, jawaban yang benar adalah B.

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

7

Iklan

Iklan

Pertanyaan serupa

Diketahui vektor-vektor berikut p ​ = ⎝ ⎛ ​ 2 9 3 ​ ⎠ ⎞ ​ , q ​ = ⎝ ⎛ ​ 3 − 5 7 ​ ⎠ ⎞ ​ , dan r = ⎝ ⎛ ​ − 1 2 − 3 ​ ⎠ ⎞ ​ Hituglah hasil operasi vektor dari c. 2 p ​ − q ​ + 3 r

354

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