函数y=sin(wx+π/3)(w.0)在[π/4,π/2]上是减函数,求w解析：∵函数y=sin(wx+π/3)(w>0)∴函数y初相为第一象限角,离Y轴最近的极值点为最大值点极大值点：wx+π/3=2kπ+π/2==>x=2kπ/w+π/(6w)极小值点：wx+π/3=2kπ...