问题
填空题
计算:
|
答案
根据分式的运算法则:原式=
+1 2
•1 2
+1 3
•1 3
+1 4
•1 4
=1 5
+(1 2
-1 2
)+(1 3
-1 3
)+(1 4
-1 4
)=1 5
.4 5
计算:
|
根据分式的运算法则:原式=
+1 2
•1 2
+1 3
•1 3
+1 4
•1 4
=1 5
+(1 2
-1 2
)+(1 3
-1 3
)+(1 4
-1 4
)=1 5
.4 5