3) f(x) = (6x -1)⁻⁵
f'(x) = -5(6x -1)⁻⁶ * (6x -1)' = -30/(6x -1)⁶
f'(x₀) = f'(1/3) = -30/(6*1/3 -1)⁶ = -30
4) f(x) = √(3x² +4)
f'(x) = 1/2√(3x² +4) * (3x² +4)' = 6x/2√(3x² +4) = 3x/√(3x² +4)
5) f(x) = x⁵ - 3 1/3 x³ +5x
f'(x) = 5x⁴-10x² +5
f'(x₀) = f'(-1) = 5 -10 +5 = 0
А) x=-3
б)x=-0.1
в)x=1/18
г)x=-1/12
д)х=1,6
e)x=-1
ж)x=1
и)x=-90
4.7 - 1.4/7.5 = 4.51
(4.7 - 1.4)/ 7.5 = 0.44