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Which of the following is a second order differential equation?A. (y’)2 + x = y2B. y’y’’ + y = sinxC. y’’’+(y’’)2+y=0D. y’ = y2 |
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Answer» Order is defined as the number which represents the highest derivative in a differential equation Second order means the order should be 2 which means the highest derivative in the equation should be d2y/dx2 or y’’ Let us examine each option given A. (y’)2 + x = y2 The highest order derivate is y’ which is first order. B. y’y’’ + y = sinx The highest order derivate is y’’ which is second order. C. y’’’+(y’’)2+y=0 The highest order derivate is y’’’ which is third order. D. y’ = y2 The highest order derivate is y’ which is first order. |
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