### Author Topic: Secondary Textbook Chp1.2 Exercise 10  (Read 1827 times)

#### Wanying Zhang

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##### Secondary Textbook Chp1.2 Exercise 10
« on: January 18, 2019, 06:16:16 PM »
I have difficulties solving this problem: $u_x + u_y + u = e^{x+2y}$. I get $\frac{dy}{dx} = 1$ from the characteristic equation and have no ideas what should be followed. Any reply would be appreciated.