Iklan

Pertanyaan

Vektor d = m i + ( 3 − m − n ) j ​ + ( m − n − p ) k , a = m i − n j ​ + ( m − p ) k dan . Jika dan b menyatakan vektor posisi dari titik A dan B, dan A B = d , a. Tentukan nilai m , n , dan p . b. Tunjukan bahwa ∣ ∣ ​ A B ∣ ∣ ​ = ∣ d ∣ = 2 1 ​ 33 ​ .

Vektor ,  dan b italic equals italic minus italic 4 i with italic hat on top italic minus j with italic hat on top italic plus italic 2 k with italic hat on top. Jika a dan  menyatakan vektor posisi dari titik A dan B, dan ,

a. Tentukan nilai .

b. Tunjukan bahwa .

Ikuti Tryout SNBT & Menangkan E-Wallet 100rb

Habis dalam

01

:

05

:

30

:

04

Klaim

Iklan

M. Mariyam

Master Teacher

Mahasiswa/Alumni Institut Pertanian Bogor

Jawaban terverifikasi

Jawaban

terbukti bahwa .

terbukti bahwa open vertical bar stack A B with bar on top close vertical bar equals open vertical bar d close vertical bar equals 1 half square root of 33.

Pembahasan

Pembahasan
lock

a. Akan ditentukan Diketahui , maka diperoleh nilai nilai diperoleh nilai Jadi nilai , dan . b. Diketahui , maka Karena maka . Akan ditentukan Jadi, terbukti bahwa .

a. Akan ditentukan stack A B with bar on top

table attributes columnalign right center left columnspacing 0px end attributes row cell stack A B with bar on top end cell equals cell b minus a end cell row blank equals cell left parenthesis negative 4 i with hat on top minus j with hat on top plus 2 k with hat on top right parenthesis minus left parenthesis m i with hat on top minus n j with hat on top plus left parenthesis m minus p right parenthesis k with hat on top right parenthesis end cell row blank equals cell left parenthesis negative 4 minus m right parenthesis i with hat on top plus left parenthesis negative 1 plus n right parenthesis j with hat on top plus left parenthesis 2 minus m plus p right parenthesis k with hat on top end cell end table 

Diketahui stack A B with bar on top equals d, maka

table attributes columnalign right center left columnspacing 0px end attributes row cell stack A B with bar on top end cell equals d row cell left parenthesis negative 4 minus m right parenthesis i with hat on top plus left parenthesis negative 1 plus n right parenthesis j with hat on top plus left parenthesis 2 minus m plus p right parenthesis k with hat on top end cell equals cell m i with hat on top plus left parenthesis 3 minus m minus n right parenthesis j with hat on top plus left parenthesis m minus n minus p right parenthesis k with hat on top end cell end table

 

diperoleh nilai m 

table attributes columnalign right center left columnspacing 0px end attributes row cell left parenthesis negative 4 minus m right parenthesis end cell equals m row cell negative 4 end cell equals cell m plus m end cell row cell negative 4 end cell equals cell 2 m end cell row cell fraction numerator negative 4 over denominator 2 end fraction end cell equals m row cell negative 2 end cell equals m end table 

nilai n 

table attributes columnalign right center left columnspacing 0px end attributes row cell negative 1 plus n end cell equals cell 3 minus m minus n end cell row cell negative 1 plus n end cell equals cell 3 minus left parenthesis negative 2 right parenthesis minus n end cell row cell negative 1 plus n end cell equals cell 5 minus n end cell row cell n plus n end cell equals cell 5 plus 1 end cell row cell 2 n end cell equals 6 row n equals cell 6 over 2 end cell row n equals 3 end table 

diperoleh nilai p 

table attributes columnalign right center left columnspacing 0px end attributes row cell 2 minus m plus p end cell equals cell m minus n minus p end cell row cell 2 minus left parenthesis negative 2 right parenthesis plus p end cell equals cell left parenthesis negative 2 right parenthesis minus 3 minus p end cell row cell 4 plus p end cell equals cell negative 5 minus p end cell row cell p plus p end cell equals cell negative 5 minus 4 end cell row cell 2 p end cell equals cell negative 9 end cell row p equals cell fraction numerator negative 9 over denominator 2 end fraction end cell end table

Jadi nilai m equals negative 2n equals 3 dan p equals fraction numerator negative 9 over denominator 2 end fraction.

b. Diketahui d equals m i with hat on top plus left parenthesis 3 minus m minus n right parenthesis j with hat on top plus left parenthesis m minus n minus p right parenthesis k with hat on top, maka

table attributes columnalign right center left columnspacing 0px end attributes row d equals cell left parenthesis negative 2 right parenthesis i with hat on top plus left parenthesis 3 minus left parenthesis negative 2 right parenthesis minus 3 right parenthesis j with hat on top plus open parentheses open parentheses negative 2 close parentheses minus 3 minus open parentheses fraction numerator negative 9 over denominator 2 end fraction close parentheses close parentheses k with hat on top end cell row d equals cell negative 2 i with hat on top plus 2 j with hat on top plus negative 1 half k with hat on top end cell end table 

Karena stack A B with bar on top equals d maka open vertical bar stack A B with bar on top close vertical bar equals open vertical bar d close vertical bar.

Akan ditentukan open vertical bar d close vertical bar

table attributes columnalign right center left columnspacing 0px end attributes row cell open vertical bar d close vertical bar end cell equals cell square root of left parenthesis negative 2 right parenthesis squared plus 2 squared plus open parentheses negative 1 half close parentheses squared end root end cell row blank equals cell square root of 4 plus 4 plus 1 fourth end root end cell row blank equals cell square root of 8 plus 1 fourth end root end cell row blank equals cell square root of 33 over 4 end root end cell row blank equals cell 1 half square root of 33 end cell end table 

Jadi, terbukti bahwa open vertical bar stack A B with bar on top close vertical bar equals open vertical bar d close vertical bar equals 1 half square root of 33.

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

3

Iklan

Pertanyaan serupa

Diketahui vektor a ⇀ = 4 i ⇀ − 5 j ⇀ ​ + 3 k ⇀ dan titik P ( 2 , − 1 , 3 ) . Jika panjang PQ ⇀ ​ sama dengan panjang a ⇀ dan berlawanan arah dengan , maka tentukan koordinat Q.

1

4.6

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 02130930000

02130930000

Ikuti Kami

©2026 Ruangguru. All Rights Reserved PT. Ruang Raya Indonesia