F'(x)= 3x²+6x-5 dan f(-1)=8, rumus fungsi f(x) =...

Integral

Cari f(x) dlu dgn integral

int 3x² + 6x - 5 dx
= 3/(2+1) x³ + 6/(1+1) x² - 5x + C
= x³ + 3x² - 5x + C

f(-1) = (-1)³ + 3 . (-1)² - 5(-1) + C
8 = -1 + 3 + 5 + C
8 = 7 + C
C = 1


f(x) = x³ + 3x² - 5x + 1