Jawabannya jangan ngasal dan harus ada penjelasan nya
Jika yz : xz : xy = 2 : 3 : 4,carilah x/yz : y/xz
Jawaban:
yz : xz : xy = 2 : 3 : 4
misal :
yz = 2n
xz = 3n
xy = 4n
(xz)² = (3n)² = 9n²
(yz)² = (2n)² = 4n²
(xz)² : (yz)²
x² : y²
x²/xyz : y²/xyz
x/yz : y/xz
maka :
x/yz : y/xz = (xz)² : (yz)² = 9n² : 4n² = 9 : 4
#edisiudhdirevisi :'
Mohon maaf kalau salah tolong dikoreksi. Semoga bermanfaat ^-^
Jawab:
x/yz : y/xz = 9 : 4
PEMBAHASAN
Cara Pertama
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Cara Kedua
yz : xz : xy = 2 : 3 : 4
⇒ xz/yz = 3/2 ⇒ x = (3/2)y
⇒ xy/xz = 4/3 ⇒ y = (4/3)z
⇒ yz/xy = 2/4 ⇒ z = (1/2)x
x/yz = [(3/2)y] / [(y·(1/2)x]
⇔ x/yz = (3/2) / [(1/2)x]
⇔ x/yz = 3/x
y/xz = y / [(3/2)y·(1/2)x]
⇔ y/xz = 1 / [(3/4)x]
⇔ y/xz = 4/(3x)
x/yz : y/xz = 3/x : 4/(3x)
⇔ x/yz : y/xz = 9/(3x) : 4/(3x)
⇔ x/yz : y/xz = 9 : 4