问题
解答题
计算:
|
答案
+12+22 1×2
+…+22+32 2×3 1002+1012 100×101
=(
-12+22 1
)+(12+22 2
-22+32 2
)+(22+32 3
-32+42 3
)…+(32+42 4
-1002+1012 100
),1002+1012 101
=(1+4)+(
-22+32 2
)+(22+12 2
-32+42 3
)+…+(32+22 3
-1002+1012 100
)-1002+992 100
,1002+1012 101
=5+
+32-12 2
+…+42-22 3
-1012-992 100
,1002+1012 101
=5+
+(3+1)×(3-1) 2
+…+(4+2)×(4-2) 3
-(101+99)(101-99) 100
,1002+1012 101
=5+4+4+…+4-
,1002+1012 101
=5+4×99-200
,1 101
=5+396-200
,1 101
=200
.100 101