Differentsial tenglamalar to’g’risida asosiy tushunchalar. Birinchi tartibli differentsial tenglamalar uchun Koshi masalasi

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Reja:
1. Differentsial tenglamalar to’g’risida asosiy tushunchalar
2. Birinchi tartibli oddiy differentsial tenglamalar
3. Koshi masalasi