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y₁ = y₂
x² - 4x + 3 = x - 1
x² - 5x + 4 = 0
(x - 1)(x - 4) = 0
x = 1 atau x = 4
Luas = int [1 - 4] (x - 1) - (x² - 4x + 3) dx
= - (1/3)x³ + (5/2)x² - 4x [1 - 4]
= (- 64/3 + 40 + 16) - (- 1/3 + 5/2 - 4)
= - 63/3 + 56 - 5/2 + 4
= - 21 + 60 - 5/2
= 39 - 5/2
= 78/2 - 5/2
= 73/2
Gambar lihat pd lampiran