1.

The number of arbitrary constants in the general solution of a differential equationof fourth order are:(A) 0                 (B) 2                 (C) 3                 (D) 4

Answer» General equation of 4th order is
`(d^4y)/dx^4=k``(d^3y)/(dx^3)=kx+c1`
`(d^2y)/(dx^2)=kx^2/2+c1x+c2`
`(dy)/(dx)=kx^3/6+(c1)x^2/2+c2x+c3`
`y=kx^4/24+(c1)x^3/6+c2x^2/2+c3x+c4`
Number of arbitrary constant=`4`


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