f '(x)=6x-2 dan f (-2)=12

Bab Integral
Matematika SMA Kelas XI

f'(x) = 6x - 2
∫ (6x - 2) dx = (6/(1 + 1)) x¹⁺¹ - 2x
                   = 3x² - 2x + C

f(-2) = 12
3 (-2)² - 2 (-2) + C = 12
12 + 4 + C = 12
C = 12 - 12 - 4
C = -12

f(x) = 3x² - 2x - 12