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Question

The order of the differential equation whose general solution is given by y=(c1+c2) cos (x+c3)c4.ex+cs is
  1. 5
  2. 4
  3. 2
  4. 3


Solution

The correct option is D 3
y=(c1+c2) cos (x+c3)c4.ec5.ex
Let c1+c2=A and c3=B, c4.ec5=C
y=A cos (X+B)Cex
3 arbitrary constants order = 3
Actual equation after solving is  d3ydx3+dydx=d2ydx2+y






 

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