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MAT244--Lectures & Home Assignments / problem 6 in 1.3
« on: September 23, 2018, 04:50:56 PM »
why (d^3y)/(dt^3) + t (dy)/(dt) +(cos^2(t))y = t^3 is linear? It doesn't have second derivative of dy dt, so it is not a linear equation.
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