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Q86Section II (Mathematics)86 of 180

The fully expanded Euler–Lagrange equation

The Euler-Lagrange's differential equation for the extremization of the functional I(y(x))=∫x1x2f(x,y,y′)dxI(y(x))=\int_{x_1}^{x_2}f(x,y,y')dx is:

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