问题
解答题
附加题: (1)已知|a-2|+|b+6|=0,则a+b=______ (2)求|
|
答案
(1)∵|a-2|+|b+6|=0,
∴a-2=0,b+6=0,
∴a=2,b=-6,
∴a+b=2-6=-4;
(2)|
-1|+|1 2
-1 3
|+…+|1 2
-1 99
|+|1 98
-1 100
|1 99
=1-
+1 2
-1 2
+…+1 3
-1 98
+1 99
-1 99 1 100
=1-1 100
=
.99 100
故答案为:-4,
.99 100