Question 607665
You cannot divide by zero. So 5-9x can't be zero. If it were, then



5-9x = 0 ----> x = 5/9


So x = 5/9 makes the denominator zero. Therefore, you need to exclude this value from the domain. 



So the domain is <img src="http://latex.codecogs.com/gif.latex?\LARGE \left\{x\left|x\in\mathbb{R}, x\neq \frac{5}{9}\right\} " title="x" />

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