NPMa = BM 80- 10Ya = 20 10 Ya = 60 Ya = 6 NPMb = BM 180 – 40 Yb = 20 40 Yb = 160 Yb = 4 Y = Ya + Yb = 6 + 4 = 10 B = 50 + 20 Y = 50 + 20 ( 10 ) = 250 Ha = 80 – 5 Ya = 80 + ( -5 ) ( 6 ) = 50 Hb = 180 – 20 Yb = 180 – 20 ( 4 ) = 100 ∏ = HaYa + HbYb – B = 50 ( 6 ) + 100 ( 4 ) – 250 = 450
Ea = ∂Ya. Ha = 1 x 50 = -1,6 ∂Ha Ya 5 6 Eb = ∂Yb Ea = ∂Ya . Ha = 1 x 50 = -1,6 ∂Ha Ya 5 6 Eb = ∂Yb . Hb = - 1 x 100 = -1,125 ∂Hb Yb 20 4 I Ea I > I Eb I MONOPOLI DG DUA PABRIK Keuntungan : ∏ = Hy. Y – Ba – Bb Syarat untuk mencapai keuntungan maksimum : ∂∏ = NPM – Bma = 0 ∂Ya ∂∏ = NPM - BMb = 0 ∂Yb Maka NPM = Bma = BMb
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