问题
解答题
已知x=
|
答案
∵x=
=1
-12
+1，2
∴
+1 x-2 2 x+1
=
+1
+1-22 2
+1+12
=
+1
-12 2
+22
=
+
+12 (
-1)(2
+1)2 2×(2-
)2 (2+
)(2-2
)2
=
+1+2-2 2
=3．
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已知x=
|
∵x=
=1
-12
+1，2
∴
+1 x-2 2 x+1
=
+1
+1-22 2
+1+12
=
+1
-12 2
+22
=
+
+12 (
-1)(2
+1)2 2×(2-
)2 (2+
)(2-2
)2
=
+1+2-2 2
=3．