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The general solution of the differential equation ex dy + (y ex + 2x) dx = 0 is ______. - Mathematics

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प्रश्न

The general solution of the differential equation ex dy + (y ex + 2x) dx = 0 is ______.

विकल्प

  • xey + x2 = C

  • xey + y2 = C

  • yex + x2 = C

  • yey + x2 = C

MCQ
रिक्त स्थान भरें
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उत्तर

The general solution of the differential equation ex dy + (y ex + 2x) dx = 0 is yex + x2 = C.

Explanation:

The given equation

exdy + (yex + 2x) dx = 0

or `e^x dy/dx + ye^x + 2x = 0`

`dy/dx + 1 * y = (- 2x)/e^x`

Comparing this equation with `dy/dx + Py = Q.`

P = 1, Q = `(- 2x)/e^x`

∴ `I.F. = e^(int 1 dx) = e^x`

Hence, the general solution of the equation

`y * e^x = int (- 2x)/e^x * e^x dx + C`

`y e^x = int - 2 x dx + C`

`y e^x = - 2 x^2/2 + C`

`y e^x = - x^2 + C`

`y e^x + x^2 = C`

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अध्याय 9: Differential Equations - Exercise 9.7 [पृष्ठ ४२१]

APPEARS IN

एनसीईआरटी Mathematics Part 1 and 2 [English] Class 12
अध्याय 9 Differential Equations
Exercise 9.7 | Q 18 | पृष्ठ ४२१

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