G Use the Integral Test to determine whether the series is convergent or divergent. [infinity] ∑ n = 1 6 n 4 In order to apply the Integral Test for the function f ( x ) on the interval [ a , [infinity] ) , which of the following must be true? (Select all that apply.) f is continuous. f is differentiable. f is positive. f is negative. f is increasing. f is decreasin