Determine If the Given Function Y = F(x) Is a Solution

question 121

True/False

Determine if the given function y = f(x) is a solution of the accompanying differential equation.
- $$\begin{array} { l } y ^ { \prime } - y = 3 e ^ { x } \\y = e ^ { 3 x } + 3 x e ^ { x }\end{array}$$

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