问题
填空题
已知
|
答案
∵
=x2-x+1 x 1 7
∴x+
-1=1 x 1 7
即x+
=1 x
(3分)8 7
又∵x2+
=(x+1 x2
)2-2=1 x
-2=-64 49
(6分)34 49
∴
=x2 x4+x2+1
=1 x2+
+11 x2
=1 -
+134 49
(10分)49 15
已知
|
∵
=x2-x+1 x 1 7
∴x+
-1=1 x 1 7
即x+
=1 x
(3分)8 7
又∵x2+
=(x+1 x2
)2-2=1 x
-2=-64 49
(6分)34 49
∴
=x2 x4+x2+1
=1 x2+
+11 x2
=1 -
+134 49
(10分)49 15