on the ends it said Let and the answer choice B

27. Let x = Q1 be the point of inflection of f(x) = 8x3 + 11x2 + 15x + 6. Le Q2 = 1 if f increases in an interval centered at x = Q1, and Q2 = 0 otherwise. Le Q = In(3 + 1Q1| + 2|Q2)). Then T = 5 sin?(100Q) satisfies:- (A) 0