Tentukan turunan fungsi fungsi berikut. a. f(x) = (2x^2 - x + 1)^8 b. f(x) = 2x - 5 / x + 3

a) f'(x) = 8(2x² - x + 1)^7.(4x - 1) = 8(4x - 1)(2x² - x + 1)^7
b) u = 2x - 5 → u' = 2
v = x + 3 → v = 1
f'(x) = (u'v - v'u)/v²
= (2(x + 3) - 1(2x - 5))/(x + 3)²
= 11/(x + 3)²