1.y=sin2x-x,x∈[-90度，90度]
求此函数的最大值最小值
1.解:y'=2cos2x-1=0。 得x=pi/6.
得到最大值y(x=pi/6)=sqrt(3)/2-pi/6.
最小值出现在x=pi/2时，y=-pi/2.
2.动点P(x,y)在圆上x^2+(y-1)^2=1,求(y-1)/(x-2)的最大值和2x+y的最小值
2.解:利用圆的参数方程
x=cos@
y=sin@+1
转化为三角函数求解
3.f(x)=x+2cosx 在区间[0,派/2]上最大值和最小值！
3.解:f(x)=x+2cosx
f'(x)=1-2sinx=0，得x=π/6
f(π/6)=π/6+2cos(π/6)=π/6+√3
f(0)=2
f(π/2)=π/2
π/6+√3＞2＞π/2
f(x)=x+2cosx在[0，π/2]上的最大值是π/6+√3高中数学max函数最小值怎么找、最小值是π/2
(具体情况具体分析)
写出连个函数过程Max 和 Min 可求出任意三个数的最大最小值
Function min(a As Long, b As Long, c As Long) As Long
Dim ls As Long
If a > b Then
ls = b
Else
ls = a
End If
If c < ls Then ls = c
min = ls
End Function
Function max(a As Long, b As Long, c As Long) As Long
Dim ls As Long
If a > b Then
ls = a
Else
ls = b
End If
If c > ls Then ls = c
max = ls
End Function
Private Sub Command1_Click()
Print 35,24,34的最大数是：; max(35, 24, 34)
Print 35,24,34的最小数是：; min(35, 24, 34)
Print 35,24,34,27,36的最大数是：; max(max(35, 24, 34), 27, 36)
Print 35,24,34,27,36的最小数是：; min(min(35, 24, 34), 27, 36)
End Sub