首页 > 留学知识库

问题: 初三数学题,化简

√[n*(n+1)*(n+2)*(n+3)+1]
化简它

解答:

√[n*(n+1)*(n+2)*(n+3)+1]

只要把n*(n+1)*(n+2)*(n+3)+1化成平方数即可
 n*(n+1)*(n+2)*(n+3)+1
=n(n+3)(n+1)(n+2)+1
=(n²+3n)(n²+3n+2)+1
=(n²+3n)²+2(n²+3n)+1
=(n²+3n+1)²
原式=n²+3n+1