Let f(x) = |n(1 2x). Which of the following represents 3' '(x) for all values of x for which the function is defined? Let f(x) = log2(4x + 8x In 2). For all values of a for which the function is defined, what is the instantaneous rate of change at x = a? 1 O a In 2 1 O 2 a In 2 1 O 4a(1 + 2 In 2)