设函数f(x)属于区间[0,π/2],且f(0)f(π/2)

题目

设函数f(x)属于区间[0,π/2],且f(0)f(π/2)
详情看图

答案

题目的表述应该是f(x)在[0,π/2]上连续,而非f(x)∈[0,π/2],否则f(0)*f(π/2)