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高中数学必修1-3-1-2
高​中​数​学​必​修课​件
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你可能喜欢matlab递推求解，知道初值，末值和递推公式初值X(1)=100,末值X(21)=200,递推公式为：X(i)=[(1-p)*X(i+1)+(1+p)*X(i-1)].其中的P可等于0，1，5，10。求每个X的值。我写的程序如下：clearPo=input('输入网格Pe数_百度作业帮
matlab递推求解，知道初值，末值和递推公式初值X(1)=100,末值X(21)=200,递推公式为：X(i)=[(1-p)*X(i+1)+(1+p)*X(i-1)].其中的P可等于0，1，5，10。求每个X的值。我写的程序如下：clearPo=input('输入网格Pe数
matlab递推求解，知道初值，末值和递推公式初值X(1)=100,末值X(21)=200,递推公式为：X(i)=[(1-p)*X(i+1)+(1+p)*X(i-1)].其中的P可等于0，1，5，10。求每个X的值。我写的程序如下：clearPo=input('输入网格Pe数Po=');X=1:21;T=zeros(1,21);T(1)=100;T(21)=200;for j=2:20
T(j)=((1-Po)*(T(j+1))+(1+Po)*(T(j-1)))*0.5;enddisp(T(1:21))当我输入p=0时，结果是：[ 100, 50, 25, 25/2, 25/4, 25/8, 25/16, 25/32, 25/64, 25/128, 25/256, 25/512, 25/8, 25/2, 25/168, 25/625/0]回代后发现得到的数并不符合递推式！试了其他P值发现也不对！为什么呢？我的编程有什么问题？该怎么改呢？谢谢大家！~~
你好 你的这个递推公式是i+1
i 和i-1的三个元素之间的关系而初始值你只给了T(1)一个数,所以它对T(2)没法处理，就会默认为T(1)的一半 依次类推 而最后200与前面的数无任何关系 我试着想写出来两个 元素之间的递推公式 但是好像比较麻烦 而且不统一 就放弃了你看看把递推公式换一种形式 或者再给一个T(2)就搞定了！假如不给T(21)而给T（2）=110输入网格Pe数Po=0clearp=input('输入网格Pe数Po=');X=1:21;T=zeros(1,21);T(1)=100;T(2)=110;for j=2:20
T(j+1)=(T(j)-(1+p)*T(j-1))/(1-p);enddisp(T(1:21))
Columns 1 through 9
Columns 10 through 18
Columns 19 through 21
10 如果只给T1和T21 确实搞不出来您的举报已经提交成功，我们将尽快处理，谢谢！
大家还关注您的举报已经提交成功，我们将尽快处理，谢谢！
=-2(x^2-3x+11/2)=-2(x-3/2)^2-13/2
所以总小于0
当x为3/2时 直最大
最大直为-13/2
大家还关注2999人阅读
我本来是要安ettercap dependencs的，没看到ettercap下面直接有可以使用的命令，我上次看到了，也提醒了自己，但是这次我多花了5个小时搞定它，。包括了
ubuntu的安装，还是烂笔头比较好阿，所以今天就把自己的这些问题记下来。
Ubuntu 12.04LTS安装，我这次是直接运行wubi.exe ，花了半个多小时的时间，我也没有去找捷径，因为实验室的网速还是可以的，下次要是系统没了，估计也就没有这么好的网速了。
Ubuntu 12.04LTS下直接安装 libssl-dev 失败
$ sudo apt-get install libssl-dev
Reading package lists... Done
Building dependency tree&&&&&
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
&libssl-dev : Depends: libssl1.0.0 (= 1.0.1-4ubuntu5) but 1.0.1-4ubuntu5.3 is to be installed
&&&&&&&&&&&&&&Recommends: libssl-doc but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
已安装的libssl1.0.0版本太高, 无法支持
$dpkg -l *libssl*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name&&&&&&&&&&&&&& Version&&&&&&&&&&& Description
+++-==================-==================-====================================================
un& libssl-dev&&&&&&&& &none&&&&&&&&&&&&& (no description available)
un& libssl-doc&&&&&&&& &none&&&&&&&&&&&&& (no description available)
ii& libssl1.0.0&&&&&&& 1.0.1-4ubuntu5.3&& SSL shared libraries
使用aptitude软件包管理器
1. 安装aptitude
$sudo apt-get install aptitude
2. 使用aptitude安装 libssl-dev包, 采用建议的解决方案(将libssl1.0.0版本降级)
$sudo aptitude install libssl-dev
The following NEW packages will be installed:
&&libssl-dev{b}
The following packages are RECOMMENDED but will NOT be installed:
&&libssl-doc
0 packages upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 1,528 kB of archives. After unpacking 6,179 kB will be used.
The following packages have unmet dependencies:
&libssl-dev : Depends: libssl1.0.0 (= 1.0.1-4ubuntu5) but 1.0.1-4ubuntu5.3 is installed.
&&&&&&&&&&&&&&Depends: zlib1g-dev but it is not going to be installed.
The following actions will resolve these dependencies:
&&&&&Keep the following packages at their current version:
1)&&&& libssl-dev [Not Installed]&&&&&&&&&&&&&&&&&&&&&&&
Accept this solution? [Y/n/q/?] n
The following actions will resolve these dependencies:
&&&&&Install the following packages:&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
1)&&&& zlib1g-dev [1:1.2.3.4.dfsg-3ubuntu4 (precise)]&&&&&&&&&&&&&&&&&&&&&&&&
&&&&&Downgrade the following packages:&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
2)&&&& libssl1.0.0 [1.0.1-4ubuntu5.3 (now) -& 1.0.1-4ubuntu5 (precise-updates)]
Accept this solution? [Y/n/q/?] y
The following packages will be DOWNGRADED:
&&libssl1.0.0
The following NEW packages will be installed:
&&libssl-dev zlib1g-dev{a}
The following packages are RECOMMENDED but will NOT be installed:
&&libssl-doc
0 packages upgraded, 2 newly installed, 1 downgraded, 0 to remove and 0 not upgraded.
Need to get 2,707 kB of archives. After unpacking 6,575 kB will be used.
Do you want to continue? [Y/n/?] y
Get: 1 /ubuntu/ precise-updates/main libssl1.0.0 amd64 1.0.1-4ubuntu5 [1,013 kB]
Get: 2 /ubuntu/ precise/main zlib1g-dev amd64 1:1.2.3.4.dfsg-3ubuntu4 [165 kB]
Get: 3 /ubuntu/ precise-updates/main libssl-dev amd64 1.0.1-4ubuntu5 [1,528 kB]
Fetched 2,707 kB in 5s (503 kB/s)&&&&&
Preconfiguring packages ...
dpkg: warning: downgrading libssl1.0.0 from 1.0.1-4ubuntu5.3 to 1.0.1-4ubuntu5.
(Reading database ... 150648 files and directories currently installed.)
Preparing to replace libssl1.0.0 1.0.1-4ubuntu5.3 (using .../libssl1.0.0_1.0.1-4ubuntu5_amd64.deb) ...
Unpacking replacement libssl1.0.0 ...
Setting up libssl1.0.0 (1.0.1-4ubuntu5) ...
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
Selecting previously unselected package zlib1g-dev.
(Reading database ... 150648 files and directories currently installed.)
Unpacking zlib1g-dev (from .../zlib1g-dev_1%3a1.2.3.4.dfsg-3ubuntu4_amd64.deb) ...
Selecting previously unselected package libssl-dev.
Unpacking libssl-dev (from .../libssl-dev_1.0.1-4ubuntu5_amd64.deb) ...
Processing triggers for man-db ...
Setting up zlib1g-dev (1:1.2.3.4.dfsg-3ubuntu4) ...
Setting up libssl-dev (1.0.1-4ubuntu5) ...
验证libssl-dev包安装情况:
$dpkg -l *libssl*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name&&&&&&&&&&&&&& Version&&&&&&&&&&& Description
+++-==================-==================-====================================================
ii& libssl-dev&&&&&&&& 1.0.1-4ubuntu5&&&& SSL development libraries, header files and document
un& libssl-doc&&&&&&&& &none&&&&&&&&&&&&& (no description available)
ii& libssl1.0.0&&&&&&& 1.0.1-4ubuntu5&&&& SSL shared libraries
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