问题
解答题
先计算
|
答案
+1 1-x 1 1+x
=1+x+1-x 1-x2
=
;2 1-x2
原式=
+2 1-x2
+2 1+x2 4 1+x4
=
+4 1-x4 4 1+x4
=
.8 1-x8
先计算
|
+1 1-x 1 1+x
=1+x+1-x 1-x2
=
;2 1-x2
原式=
+2 1-x2
+2 1+x2 4 1+x4
=
+4 1-x4 4 1+x4
=
.8 1-x8