Физика твердого тела. Физическое материаловедение. Компьютерные методы физики. Зиненко В.И - 13 стр.

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25
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3.
Y''+16*Y=20, Y(0), Y'(0)=0 4.
Y''+Y'/X+Y=20, Y(0)=1, Y'(0)=0

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