cos2x+√3*sin2x
=2[(1/2)cos2x+(√3/2)sin2x]
=2sin(2x+π/6)
x∈[0,π/2]
∴2x+π/6∈[π/6,7π/6]
∵2sin(2x+π/6)=a+1有两个不同的实数根
∴a+1∈[1,2)
∴a∈[0,1)
cos2x+√3*sin2x
=2[(1/2)cos2x+(√3/2)sin2x]
=2sin(2x+π/6)
x∈[0,π/2]
∴2x+π/6∈[π/6,7π/6]
∵2sin(2x+π/6)=a+1有两个不同的实数根
∴a+1∈[1,2)
∴a∈[0,1)