Question

Which of the following functions are solutions of the differential equation y′′−9y′+18y=0?**A. **y(x)=e3x**B. **y(x)=6x**C. **y(x)=3x**D. **y(x)=0**E. **y(x)=e−x**F. **y(x)=e6x**G. **y(x)=ex

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