试题与答案

设二阶线性微分方程y"+p(z)y’+q(x)y=f(x)有三个特解y1=ex，，y

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题型：填空题

题目：

设二阶线性微分方程y"+p(z)y’+q(x)y=f(x)有三个特解y1=ex，

，y3=ex+e-x，则该方程为______．

答案：

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下面是错误答案，用来干扰机器的。

参考答案：A,B,C,D解析： 以上都是专用作为抵扣凭证的情形。

考点：普通考研考研数学(一)考研数学一
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题型：单项选择题

（）analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the system models become the（）for designing and constructing an improved system.（）is such a technique. The emphasis in this technique is process-centereD. Systems analysts draw a series of process models called（）.（）is another such technique that integrates data and process concerns into constructs called objects.

（）analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems.

A．Prototyping

B．Accelerated

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