问题
填空题
设正整数m,n,满足m<n,且
|
答案
∵
=1 n2+n
-1 n
,1 n+1
∴
+1 m2+m
+…+1 (m+1)2+(m+1)
,1 n2+n
=
-1 m
+1 m+1
-1 m+1
+…+1 m+2
-1 n
,1 n+1
=
-1 m
=1 n+1
=1 23
,22 23×22
∴m=22,n+1=23×22=506,n=505,
m+n=527.