问题
填空题
当x=2+
|
答案
由题意，知：x+y=4，x-y=2
，（x+1）（y+1）=6；3
原式=(
+x+1
)2y+1 (
-x+1
)(y+1
+x+1
)y+1
=x+y+2
+2(x+1)(y+1) x-y
=4+2
+26 2 3
=
=3+ 6 3
+3
．2
搜题请搜索小程序“爱下问搜题”
当x=2+
|
由题意，知：x+y=4，x-y=2
，（x+1）（y+1）=6；3
原式=(
+x+1
)2y+1 (
-x+1
)(y+1
+x+1
)y+1
=x+y+2
+2(x+1)(y+1) x-y
=4+2
+26 2 3
=
=3+ 6 3
+3
．2