Jawab:
turunan
1. f(x) = 5x³ - 2x² + x - 6
tentukan nilai dari - 2 f(1) + 2 f'(0) - 3 f"(-1) - 5 f"'(x) =
f(1) = 5 - 2 + 1 - 6 = -2
f'(x) = 15x² - 4x + 1
f'(0) = 1
f"(x) = 30x - 4
f"(-1) = -30 - 4 = - 34
f"' (x) = 30
nilai dari - 2 f(1) + 2 f'(0) - 3 f"(-1) - 5 f"'(x) =
= - 2(-2) + 2(1) - 3(-34) - 5(30)
= 4 + 2 + 102 -150
= -42
2) f(x) = (5x- 3)(4x + 4)
tentukan nilai dari 2 .f(1) - 2 f'(2) + f"'(x) =
f(x) = 20x² + 8x - 12
f(1) = 20 + 8 - 12 = 16
f'(x) = 40x + 8
f'(2) = 80 + 8 = 88
f"(x)= 40
f"'(x) = 0
nilai dari 2 .f(1) - 2 f'(2) + f"'(x) =
= 2 (16) - 2(88) + 0
= -144