Problem

(a) Prove que Mdx + Ndy = 0 tem um fator integrante que depende somente da soma x + y se e...

(a) Prove que Mdx + Ndy = 0 tem um fator integrante que depende somente da soma x + y se e somente se a expressão

depender somente de x + y.

(b) Use o item (a) para resolver a equação (3 + y + xy)dx + (3 + x + xy)dy = 0 .

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Solutions For Problems in Chapter 2.5

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