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DIFFERENTIAL EQUATIONS
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Leibnitz was actually interested in the problem of finding a curve whose tangents
were prescribed This led him to discover the ‘method of separation of variables’
1691 A year later he formulated the ‘method of solving the homogeneous
differential equations of the first order’ He went further in a very short time
to the discovery of the ‘method of solving a linear differential equation of the
first-order’