#F
y = x² - 5x + 4
y = 0 --> (x - 4)(x - 1) = 0 -> x= 4 atau x = 1
batas intergral x = 2 ,x = 4 , daerah tertutup dibawah sumbu x
Luas = - ₂⁴∫ (x² - 5x + 4) dx
= - [1/3 x³ - 5/2 x² + 4x ]⁴₂
= - [ 1/3 (4³ -2³) - 5/2 (4²-2²) + 4(4 - 2)]
= - [1/3(56) - 5/2 (12) + 4(2)]
= - ( 56/3 - 30 + 8 )
= - (56/3 -90/3 +24/3)
= - (- 10/3)
= 3 ¹/₃ satuan luas
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#F
y = x² - 5x + 4
y = 0 --> (x - 4)(x - 1) = 0 -> x= 4 atau x = 1
batas intergral x = 2 ,x = 4 , daerah tertutup dibawah sumbu x
Luas = - ₂⁴∫ (x² - 5x + 4) dx
= - [1/3 x³ - 5/2 x² + 4x ]⁴₂
= - [ 1/3 (4³ -2³) - 5/2 (4²-2²) + 4(4 - 2)]
= - [1/3(56) - 5/2 (12) + 4(2)]
= - ( 56/3 - 30 + 8 )
= - (56/3 -90/3 +24/3)
= - (- 10/3)
= 3 ¹/₃ satuan luas