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tutup bawah : y = 1
batas atas : x = 2
batas bawah :
y = y
x^2 = 1
x = 1
jadi, integralnya :
...2
= ∫ x^2 - 1 dx
...1
....................2
= 1/3 x^3 - x |
....................1
= (1/3 2^3 - 2) - (1/3 1^3 - 1)
= (8/3 - 6/3) - (1/3 - 3/3)
= 2/3 - (-2/3)
= 2/3 + 2/3
= 4/3 satuan luas