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Form a differential equation representing the given family of curves by eliminating arbitrary constant a and b.y = e2x(a + bx) |
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Answer» y = e2x (a + bx) …(1) differentiating w.r.t x, we get ⇒ y1= e2x (0 + b) + (a + bx) e2x 2 ⇒ y1 = e2xxb + (a + bx) e2x 2 ….(2) putting (1) in (2), y1 = be2x + 2y ⇒ y1 – 2y = b e2x ….(3) again differentiating w.r.t x, we get y2 – 2y1 = b.e2x.2 ….(4) putting (3) in (4) we get y2 – 2y1 = 2y1 – 4y ⇒ y2 – 4y1 + 4y = 0 is the required differential equation. |
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