题目内容
(请给出正确答案)
[主观题]
将函数f (x) = x-1(0≤x≤2)展开成周期为4的余弦级数.
将函数f(x) =x-1(0≤x≤2)展开成周期为4的余弦级数.
答案
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将函数f(x) =x-1(0≤x≤2)展开成周期为4的余弦级数.
第2题
设函数f(x)=(x-1)(x-2)(x-3),则方程f'(x)=0有______个实根.
第3题
第5题
用二分法求函数f(x)=x^3-6x-1=0在x=2~5范围内的x=2附近的一个实根,其计算误差为|xl-x2|<10^(-6)。完善下列程序。
Private Sub Command1 _Click ()
Dim V0 As Singke, v As Single, s As String
Dim x As Single, t As Single, x1 As Single, x2 As Single
x1 =0: x2=5
Do While()
x = (x1 +x2)/2
If Sgn(f1 (x)) = 1 Then
x2 = x
Else
x1 = x
End If
Loop
Print "x = "; x
End Sub
Private Function f1 (x As Single) As Single
f1 = x * x * x -6 * x-1
End Function
第8题
函数f(x)=lnx- ln(x-1)的定义域是()
A.(-1,+∞)
B.(0,+∞)
C.(1,+∞)
D.(0,1)