(2007•昌平区一模)当x2-2=0时,求代数式(1+[1/x])÷[x+1x3
1个回答
(1+
1/x])÷[x+1
x3
=
x+1/x]÷[x+1
x3
=
x+1/x]•
x3
x+1
=x
2
;
∵x
2
-2=0,
∴x
2
=2,
∴原式=2.
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