How do you write ${{\log }_{3}}x=9$ in exponential notation?

Hint: Here in this question we have been asked to write the exponential notation for given the logarithmic expression ${{\log }_{3}}x=9$ . From the basic definition of logarithm we know that for any exponential function given as ${{a}^{y}}=x$ the logarithmic function is expressed as ${{\log }_{a}}x=y$ . We will use this definition in order to answer this question.

Complete step by step answer:
Now considering from the question we have been asked to write the exponential notation for the given logarithmic expression ${{\log }_{3}}x=9$ .
From the basic definition of the logarithm which we have learnt during the basics of logarithms we know that for any exponential function given as ${{a}^{y}}=x$ the logarithmic function is expressed as ${{\log }_{a}}x=y$ .
By using this definition here in this solution process. By comparing the given logarithmic expression and the expression in the logarithmic definition we will get $a=3$ and $y=9$.
Therefore the exponential notation for the given logarithmic expression ${{\log }_{3}}x=9$ will be given as ${{3}^{9}}=x$ .

Note: While answering questions of this type we should be sure with the logarithmic concepts that we are going to apply in between the process. This is a very simple and easy question and can be answered accurately in a short span of time. Very few mistakes are possible in questions of this type. If we had confused with the definition and written it as ${{\log }_{a}}x=y\Rightarrow {{a}^{x}}=y$ then we will have the answer as ${{\log }_{3}}x=9\Rightarrow {{3}^{x}}=9$ which is a wrong answer clearly.