已知函数f(x)=Asin(wx+a)(A>0,w>0,-π/2
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已知函数f(x)=Asin(wx+a)(A>0,w>0,-π/20,w>0,-π/2π/3+a=π/2==>a=π/6

∴f(x)=3sin(2x+π/6)

单调增区间:2kπ-π/2x0=0

==>2x0+π/6=5π/6==>x0=π/3

∴x0=0或x0=π/3

(3)解析:∵将函数f(x)的图像向右平移m(m>0)个单位长度后得到函数y=g(x)为偶函数

f(x)=3sin(2x+π/6-2m)= ±3cos(2x)

π/6-2m=π/2==>m=-π/6

π/6-2m=-π/2==>m=π/3

∴m的最小值为π/3