turunan dari fungsi f(x) a. f(x) = 1/x b. f(x) = 1/4x+2

a. f(x) = 1/x
u = 1
u'= 0
v = x
v'= 1

f'(x)
= u'.v - u.v' / v^2
= 0(x) - 1(1) / x^2
= -1 / x^2

b. f(x) = 1/4x+2
u = 1
u'= 0
v = 4x + 2
v'= 4

f'(x)
= u'.v - u.v' / v^2
= 0(4x + 2) - 1(4) / (4x + 2)^2
= -4 / (4x + 2)^2