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A differential equation is given as
x2 d2y - 2x dy + 2y = 4 dx2 dx
The solution of the differential equation in terms of arbitrary constants C1 and C2 is
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- y = C1 x2 + C2 x + 4
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y = C1 + C2x + 2 x2 - y = C1 x2 + C2 x + 2
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y = C1 + C2x + 4 x2
Correct Option: C
x2 = | - 2x | + 2y = 4 | ||
dx2 | d |
Let x = ez
CF : | = θ(θ - 1) | dx2 |
⇒ θ(θ - 1) - 2θ + 2 = 0
⇒ θ2 - 3θ + 2 = 0
(θ - 1)(θ - 2) = 0
θ = 1,2
θ = C1ez + C1e2z
y = C1x2 + C2x
PI : - | + | |||
(θ - 1) | (θ - 2) |
= + 4(1 -θ)-1 - | 1 - | -1 | |||||
2 | 2 |
= + 4(1 - θ + ...) - 2 | 1 + | + ..... | 2 |
= + 4 – 2 = 2 (Neglecting higher order term)
y = CF + PI
y = C1 x2 C2 x + 2