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题型:填空题 题类: 难易度:普通
【全效核心素养评估卷】浙教版数学七(上)第二章
(1+ )×(1- )= × =1,
(1+ )×(1+ )×(1- )×(1- )= × × × = × × × =1×1=1.
根据以上信息,求出下式的结果.
(1+ )×(1+ )×(1+ )×…×(1+ )×(1- )×(1- )×(1- )×(1- )×…×(1- ).
(x﹣1)(x+1)=x2﹣1
(x﹣1)(x2+x+1)=x3﹣1
(x﹣1)(x3+x2+x+1)=x4﹣1
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