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y′′+y′+5y=t−uπ/2(t)(t−π/2); y(0)=2, y′(0)=1. uπ/2 is unit step function starting at π/2

y′′+y′+5y=t−uπ/2(t)(t−π/2); y(0)=2, y′(0)=1.

uπ/2 is unit step function starting at π/2

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