题目内容
对于正数x,规定f(x)=
,如f(1)=
=
(1)计算f(2)=______;f(
)=______;f(2)+f(
)=______;f(3)+f(
)=______;…
(2)猜想f(x)+f(
)=______,请予以证明.
x2 |
1+x2 |
1 |
1+1 |
1 |
2 |
(1)计算f(2)=______;f(
1 |
2 |
1 |
2 |
1 |
3 |
(2)猜想f(x)+f(
1 |
x |
(1)f(2)=
=
;f(
)=
=
,f(2)+f(
)=
+
=1;f(3)+f(
)=
+
=
+
=1;
(2)猜想f(x)+f(
)=1,
理由为:f(x)+f(
)=
+
=
=1.
故答案为:(1)
;
;1;1;(2)1
4 |
1+4 |
4 |
5 |
1 |
2 |
| ||
1+
|
1 |
5 |
1 |
2 |
4 |
5 |
1 |
5 |
1 |
3 |
9 |
1+9 |
| ||
1+
|
9 |
10 |
1 |
10 |
(2)猜想f(x)+f(
1 |
x |
理由为:f(x)+f(
1 |
x |
x2 |
1+x2 |
| ||
1+
|
x2+1 |
x2+1 |
故答案为:(1)
4 |
5 |
1 |
5 |
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