(a) Find the general solution of the differential equation d²y dx² +9y = x² + x + 1.

Calculus: Early Transcendentals
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Author:James Stewart
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Chapter1: Functions And Models
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Find the general solution of the differential equation
d²y
+9y=x² + x + 1.
d.x²
(b) Find a particular solution of the differential equation
d²y
+9y = f(x)
dx²
when (i) f(x) = ²x, (ii) f(x) = cos 3x.
Transcribed Image Text:Find the general solution of the differential equation d²y +9y=x² + x + 1. d.x² (b) Find a particular solution of the differential equation d²y +9y = f(x) dx² when (i) f(x) = ²x, (ii) f(x) = cos 3x.
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