问题 解答题
b+
1
c
=1
c+
1
a
=1
,求
ab+1
b
的值.
答案

b+

1
c
=1,

b=1-

1
c
=
c-1
c

c+

1
a
=1,

a=

1
1-c

ab+1
b
=a+
1
b
=
1
1-c
+
c
c-1
=1.

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