Private Sub Form_Click()
Dim last_one As Long
Dim last_two As Long
Dim this_one As Long
Dim i As Integer
last_one = 1 '数列的第二个数
last_two = 2 '数列的第三个数
i = 4 '从数列的第四个数求起
Do
this_one = last_one + last_two
last_one = last_two
last_two = ------1-------
If i = 17 Then
Form1.Print "No:17="; this_one
End If
------2------
Loop While this_one <= 100000000#
Form1.Print "No:";------3------; "is > 1E+8"
End Sub
A.①②③
B.①③④
C.②③④
D.①②③④
A.横队从右至左(纵队由前向后)依次以短促洪亮的声音转头(纵队向左转头)报数,最后一名不转头
B.数列横队时,后列最后一名报“满伍”或者“缺x名”
C.中队(站)集合时,由指挥员下达“各分队报数”的口令,各分队长在队列内向指挥员报告人数,如“第X分队到齐”或者“第X分队实到XX名”
D.横队从左至右(纵队由前向后)依次以短促洪亮的声音转头(纵队向左转头)报数,最后一名不转头
已知数列{an}的前n项和Sn=n(2n+1)
(I)求该数列的通项公式;
(Ⅱ)判断39是该数列的第几项
已知等比数列{an}中,a1=16,公比q=(1/2)
(Ⅰ)求数列{an}的通项公式;
(Ⅱ)若数列{an}的前n项的和Sn=124,求n的值