观察下列各式:2x4=3的平方-1,3x5=4的平方-1,4x6=5的平方-1,……,10x12=11的平方-1,…,将你猜想的规律用含一个字母的式子表示出来.
人气:303 ℃ 时间:2019-09-27 16:37:04
解答
n×(n+2)=(n+1)的平方-1 不谢
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