【例題】12-22+32-42+52……-1002+1012 = ( )
A. 5000 B. 5050C. 5100 D. 5151
【例題】有一串?dāng)?shù):1,3,8,22,60,164,448,……其中第一個(gè)數(shù)是1,第二個(gè)數(shù)是3,從第三個(gè)數(shù)起,每個(gè)數(shù)恰...
[詳情]
2012-08-24
1
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