What is the differential equation? |
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作者姓名: | 桨宇学 |
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作者单位: | 首都师范大学附属中学,100048 |
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摘 要: | An equation involving a derivative is called a differential equation.Such as,dy/dx=2x,and the function y=f(x)satisfies this equation.When we know the additional condition that y=2 when x=-1,the function y=f(x)will be find exactly.The additional condition is called the initial condition.It is used to evaluate constant of integration.
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关 键 词: | 中学 英语 课外阅读 阅读材料 |
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