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द्वितीय कोटि के रैखिक अवकल समीकरण (Linear Differential Equation of Second Order): द्वितीय कोटि के रैखिक अवकल समीकरण (Linear Differential Equation of Second Order):An equation of the form is Called a linear differential equation of the second order, where P, Q and R are functions of x alone (or perhaps constants). There is no loss