The quadratic polynomial f(x) has a zero at x=2. The polynomial f(f(x)) has only one real zero at x=5. Compute f(0).
有没有好办法?
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回复:有没有好办法?
-jinjing-
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(92 bytes)
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07/11/2011 postreply
13:37:17
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回复:回复:有没有好办法?
-cma-
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07/11/2011 postreply
14:36:14
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回复:回复:回复:有没有好办法?
-jinjing-
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07/11/2011 postreply
15:07:34
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回复:回复:回复:回复:有没有好办法?
-cma-
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07/11/2011 postreply
15:21:06
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If they are not both 0, 5 is not only one root.
-jinjing-
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07/12/2011 postreply
07:11:08
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[a*3*(5-b)-2]=0 or [a*3*(5-b)-b)]=0.It can't get answer.Only bot
-jinjing-
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07/12/2011 postreply
10:37:39
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5
-乱弹-
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07/12/2011 postreply
20:13:46
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愿闻其详.
-jinjing-
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07/13/2011 postreply
05:18:53
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不知道答案,但可列两个方程。
-乱弹-
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07/12/2011 postreply
20:17:43
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回复:有没有好办法?
-康MM-
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07/13/2011 postreply
16:49:19
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回复:回复:有没有好办法?
-15少-
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07/14/2011 postreply
06:57:08
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回复:回复:回复:有没有好办法?
-康MM-
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07/14/2011 postreply
08:43:07
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Please explain.
-15少-
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07/14/2011 postreply
10:22:52
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if change to
-15少-
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07/14/2011 postreply
10:26:58
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回复:回复:回复:回复:有没有好办法?
-康MM-
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07/14/2011 postreply
12:01:02
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good
-15少-
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07/14/2011 postreply
13:24:29
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Why? if f(8)=0,b=8?
-jinjing-
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07/15/2011 postreply
21:06:13
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Assume f(x)'s coefficients are all real;
-乱弹-
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07/13/2011 postreply
16:56:53
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回复:Assume f(x)'s coefficients are all real;
-jinjing-
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07/13/2011 postreply
20:37:56
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Did not read this before send my post, which is the same.
-wxcfan123-
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07/15/2011 postreply
16:41:21
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Dear mca,I'm sorry, my answer is wrong as misunderstanding the Q
-jinjing-
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07/14/2011 postreply
06:05:12
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-32/9
-15少-
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07/14/2011 postreply
06:40:13
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two solutions:-32/9 and -128/9.
-jinjing-
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07/14/2011 postreply
10:42:34
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no sir!
-15少-
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07/14/2011 postreply
11:29:04
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yes,b=2,OK,b=8,fof has 5,5+(-)3SQUAT3/2,3roots.not good.
-jinjing-
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07/14/2011 postreply
16:43:38
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follow jinjing
-wxcfan123-
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07/15/2011 postreply
10:28:27
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谢谢您给我打气,
-jinjing-
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07/15/2011 postreply
11:13:27
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回复:谢谢您给我打气,
-wxcfan123-
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07/15/2011 postreply
14:13:18
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If you solve a from I, should prove II does not have real root,
-wxcfan123-
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07/15/2011 postreply
14:41:19
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Wrong way is always as wrong reason.
-jinjing-
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07/15/2011 postreply
15:21:12
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Math is not riddle
-15少-
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07/15/2011 postreply
15:20:39
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回复:Math is not riddle
-jinjing-
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07/15/2011 postreply
16:03:10
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Why make stupid calcul when
-15少-
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07/15/2011 postreply
17:33:47
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You totally misunderstanding me, f(x)=a(X-5)^2+b,why b=2? you te
-jinjing-
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07/15/2011 postreply
18:04:50
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you tell me,please,not 8.
-jinjing-
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07/15/2011 postreply
18:07:08
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Ms. Kang has explained, her explanation is not as clear as you d
-15少-
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07/16/2011 postreply
06:30:03
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Why f(8)=0?Cs we use a Thm, It is unknow for most people here.
-jinjing-
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07/16/2011 postreply
08:19:30
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You like calcul
-15少-
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07/16/2011 postreply
09:10:20
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回复:You totally misunderstanding me, f(x)=a(X-5)^2+b,why b=2? you
-15少-
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07/16/2011 postreply
06:09:01
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cma,where have you been? Following is my solution for you,
-jinjing-
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07/15/2011 postreply
18:57:47
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An elegant way to get jingin's wrong answer 8/9
-15少-
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07/16/2011 postreply
08:52:07