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AP EAMCET · Maths · Differential Equations

By eliminating the arbitrary constants from y=a+bsinx+c-dex+e+f, the differential equation obtained is of order

  1. A 6
  2. B 4
  3. C 3
  4. D 5
Verified Solution

Answer & Solution

Correct Answer

(C) 3

Step-by-step Solution

Detailed explanation

y=a+bsinx+c-dex+e+f Differentiating, we get dydx=a+bcosx+c-dex+e+f i.e. dydx=a+bcosx+c+y-a+bsinx+c dydx-y=a+bcosx+c-sinx+c Differentiating, we get d2ydx2-dydx=-a+bsinx+c+cosx+c d3ydx3-d2ydx2=-a+bcosx+c-sinx+c i.e. d3ydx3-d2ydx2=-dydx+y Hence, order of differential equation is 3