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> 已知方程x-1x=112的解为x1=2,x2=-12;方程x-1x=223的解为x1=3,x2=-13;方程x-1x=334的解为x1=4,x2=-14;…请观察上述方程及其解,再猜想出以下方程的解(
已知方程x-1x=112的解为x1=2,x2=-12;方程x-1x=223的解为x1=3,x2=-13;方程x-1x=334的解为x1=4,x2=-14;…请观察上述方程及其解,再猜想出以下方程的解(
题目简介
已知方程x-1x=112的解为x1=2,x2=-12;方程x-1x=223的解为x1=3,x2=-13;方程x-1x=334的解为x1=4,x2=-14;…请观察上述方程及其解,再猜想出以下方程的解(
题目详情
已知方程x-
1
x
=
1
1
2
的解为
x
1
=2,
x
2
=-
1
2
;
方程x
-
1
x
=2
2
3
的解为
x
1
=3,
x
2
=-
1
3
;
方程x
-
1
x
=3
3
4
的解为
x
1
=4,
x
2
=-
1
4
;
…
请观察上述方程及其解,再猜想出以下方程的解
(1)x
-
1
x
=n+
n
n+1
,x
1
=______,x
2
=______
(2)求方程2x
-
2
x
=21
9
11
的解.
题型:解答题
难度:中档
来源:不详
答案
(1)根据题意可得:
x
-
class="stub"1
x
=n+
class="stub"n
n+1
,
解得x1=n+1,x2=-
class="stub"1
n+1
;
(2)方程2x
-
class="stub"2
x
=21
class="stub"9
11
可变形为:x-
class="stub"1
x
=10
class="stub"10
11
,
则方程的解为:x1=11,x2=-
class="stub"1
11
.
故答案为:n+1,-
class="stub"1
n+1
.
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题目简介
已知方程x-1x=112的解为x1=2,x2=-12;方程x-1x=223的解为x1=3,x2=-13;方程x-1x=334的解为x1=4,x2=-14;…请观察上述方程及其解,再猜想出以下方程的解(
题目详情
方程x-
方程x-
…
请观察上述方程及其解,再猜想出以下方程的解
(1)x-
(2)求方程2x-
答案
x-
解得x1=n+1,x2=-
(2)方程2x-
则方程的解为:x1=11,x2=-
故答案为:n+1,-