{"id":5698,"date":"2021-09-29T18:35:44","date_gmt":"2021-09-29T13:05:44","guid":{"rendered":"https:\/\/mathemerize.com\/?p=5698"},"modified":"2021-11-21T20:17:22","modified_gmt":"2021-11-21T14:47:22","slug":"degree-and-order-of-differential-equation","status":"publish","type":"post","link":"https:\/\/mathemerize.com\/degree-and-order-of-differential-equation\/","title":{"rendered":"Degree and Order of Differential Equation"},"content":{"rendered":"
Here you will learn what is differential equation and degree and order of differential equation with examples.<\/p>\n
Let’s begin –<\/p>\n
An equation containing an independent variable, dependent variable and differential coefficients of dependent variable with respect to independent variable is called a differential equation.<\/p>\n
for example<\/strong> : \\(dy\\over dx\\) = 2xy and \\(d^2y\\over dx^2\\) = 4x are examples of differential equations.<\/p>\n The order of a differential equation is the order of the highest order derivative appearing in the equation.<\/p>\n<\/blockquote>\n Example 1<\/strong><\/span> : In the equation \\(d^2y\\over dx^2\\) + 3\\(dy\\over dx\\) + 2y = \\(e^x\\), the order of highest order derivative is 2. So, it is a differential equation of order 2.<\/p>\n Example 2<\/span><\/strong> : In the equation \\(d^3y\\over dx^3\\) – 6\\(({dy\\over dx})^2\\) – 4y = 0, the order of highest order derivative is 3. So, it is a differential equation of order 3.<\/p>\n The degree of a differential equation is the degree of the highest order derivative, when differential coefficients are made free from radicals and fractions.<\/p>\n<\/blockquote>\n Example 1<\/strong><\/span> : In the equation \\(d^3y\\over dx^3\\) – 6\\(({dy\\over dx})^2\\) – 4y = 0, the power of highest order derivative is 1. So, it is a differential equation of degree 1.<\/p>\n Example 2<\/span><\/strong> : Consider the differential equation x\\(({d^3y\\over dx^3})^2\\) – 6\\(({dy\\over dx})^4\\) + \\(y^4\\) = 0.<\/p>\n Solution<\/span><\/strong> : In this equation, the order of the highest order derivative is 3 and its power is 2. So, it is a differential equation of order 3 and degree 2.<\/p>\n Example 3<\/span><\/strong> : Consider the differential equation \\(({1 + ({dy\\over dx})^2})^{3\/2}\\) = k\\({d^2y\\over dx^2}\\).<\/p>\n Solution<\/span><\/strong> : The order of highest order differential coefficient is 2. So, its order is 2.<\/p>\n To find its degree we express the differential equation as a polynomial in derivatives. When expressed as a polynomial in derivatives it becomes \\(k^2\\)\\(({d^2y\\over dx^2})^2\\) – \\(({1 + ({dy\\over dx})^2})^3\\) = 0. Clearly, the power of the highest order differential coefficient is 2. So, its degree is 2.<\/p>\n\n\nDegree and Order of Differential Equation<\/h2>\n
Order of Differential Equation<\/strong><\/h4>\n
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Degree of Differential Equation<\/strong><\/h4>\n
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