问题
填空题
计算:1-
|
答案
原式=1-
,1 1+ 1×1987 (1-
)×19871 1987
=1-
,1 1+ 1987 1986
=1-
,1×1986 (1+
)×19861987 1986
=1-
,1986 1986+1987
=
.1987 3973
故答案为:
.1987 3973
计算:1-
|
原式=1-
,1 1+ 1×1987 (1-
)×19871 1987
=1-
,1 1+ 1987 1986
=1-
,1×1986 (1+
)×19861987 1986
=1-
,1986 1986+1987
=
.1987 3973
故答案为:
.1987 3973