已知函数f(x)=(√2)sin(2x+π/4)+1；求(2)使f(x)的最大值时x的集合；（3）f(x)在【0,π】的单调递减区间.(2)当sinx(2x+π/4)=1时f(x)获得最大值1+√2；此时2x+π/4=2kπ+π/2,2x=2kπ+π/4,x=kπ+π/8,即使f(x)获得...