在数列{an}中，a1=1，an+1=2an+2n，（Ⅰ）设bn=an2n-1，
题型：解答题
问题：
在数列{an}中，a1=1，an+1=2an+2n，（Ⅰ）设bn=
（Ⅰ）数列{bn}是等差数列； （Ⅱ）求数列{
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题型：解答题
00XFFG-78017KB
DALIAN CHINA DELIVERY OF CIF DALIAN CHINA OF 3 UNIIS & 6 P’KGS OF
B30S FORKLIFT TRUCK INCLUDING FFT4730MM S/S BATTERY & CHARGER
H. S. CODE, 84271090
DETAILS AS PER THE ATTACHED SHEET
MANUFACTURER: CEERLOFS TRUCK B. V. GERMANY
CONTRACT No.: 00XFFFG-7801KR
B30S-2 17951.00 53853.00
FREIGHT CHARGES 2050.00
INSURANCE 1346.00
TOTAL 57249.00
DADAI CORPORATION DADAI CORPORATION
P. O. BOX, 7955 SEOUL, KOREA
TELEPHONE, SIGNED BY ______
请根据以上资料，选择以下栏目的正确选项：
“成交方式”栏应填（）。
A．CIF
B．FOB
C．L/C
D．一般贸易