值域-2到2,递减区间为π/24到7π/24的闭区间
f(x)=根号3sinwx+cos(wx+π/3)+cos(wx-π/3)=根号3sinwx+coswx=2sin(wx+π/3),所以值域为-2到2,2π/w=π/2,w=4,f(x)=2sin(4x+π/3),当X属于(0,π/2)时,4x+π/3在π/3到7π/3之间,f(x)的单调递减区间为4x+π/3大于π/2小于3π/2,固递减区间为π/24到7π/24的闭区间
值域-2到2,递减区间为π/24到7π/24的闭区间
f(x)=根号3sinwx+cos(wx+π/3)+cos(wx-π/3)=根号3sinwx+coswx=2sin(wx+π/3),所以值域为-2到2,2π/w=π/2,w=4,f(x)=2sin(4x+π/3),当X属于(0,π/2)时,4x+π/3在π/3到7π/3之间,f(x)的单调递减区间为4x+π/3大于π/2小于3π/2,固递减区间为π/24到7π/24的闭区间