U₁ = (a − 3)
U₂ = a
U₃ = (a + 4)
rasio = U₂/U₁ = U₃/U₂
a/(a − 3) = (a + 4)/a
(a − 3)(a + 4) = a²
a² + a − 12 = a²
a² − a² + a = 12
a= 12
U₁ = 12 − 3
U₁ = 9
U₂ =.12
rasio = U₂/U₁ = 12/9 = 4/3
rasionya = 4/3
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U₁ = (a − 3)
U₂ = a
U₃ = (a + 4)
rasio = U₂/U₁ = U₃/U₂
a/(a − 3) = (a + 4)/a
(a − 3)(a + 4) = a²
a² + a − 12 = a²
a² − a² + a = 12
a= 12
U₁ = (a − 3)
U₁ = 12 − 3
U₁ = 9
U₂ = a
U₂ =.12
rasio = U₂/U₁ = 12/9 = 4/3
rasionya = 4/3