问题
填空题
已知
|
答案
∵
=x
-1 a
≥0a
∴x=(
-1 a
)2=a
-2+a1 a
又∵4x+x2=x(4+x)=(
-1 a
)2(a
+2+a)=(1 a
-1 a
)2(a
+1 a
)2a
∴
=(4x+x2
-1 a
)(a
+1 a
)=a
-a1 a
故填
-a.1 a
已知
|
∵
=x
-1 a
≥0a
∴x=(
-1 a
)2=a
-2+a1 a
又∵4x+x2=x(4+x)=(
-1 a
)2(a
+2+a)=(1 a
-1 a
)2(a
+1 a
)2a
∴
=(4x+x2
-1 a
)(a
+1 a
)=a
-a1 a
故填
-a.1 a