1234+1=25=5@:2345+1=121=11@;345*6+1=361=19@.(n+1)(n+

学习时间:2026-10-10 01:54:47 阅读：97

1*2*3*4+1=25=5@:2*3*4*5+1=121=11@;3*4*5*6+1=361=19@.(n+1)(n+2)(n+3)(n+4)+1=?@是平方

顺心的长颈鹿

2026-10-10 01:54:47

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(n+1)(n+2)(n+3)(n+4)+1
=(n^2+5n+4)(n^2+5n+6)+1
=(n^2+5n+5-1)(n^2+5n+5+1)+1
=(n^2+5n+5)^2-1+1
=(n^2+5n+5)^2