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Consider the differential equation (x+(x...

Consider the differential equation `(x+(x^(2))/(3!)+(x^(5))/(5!)+………)/(1+(x^(2))/(2!)+(x^(4))/(4!)+…….)=(dx-dy)/(dx+dy)`. If `y(0)=1` and the solution of the differential equation is of the form
`2yf(x)=me^(2x)+n`. Evaluate `(m+n)f(0)`.

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