Write the Word or Phrase That Best Completes Each Statement $$\text { Why does } \log _ { a } a \text { always equal } 1 \text { for any valid base a? }$$

Short Answer

Write the word or phrase that best completes each statement or answers the question.
- $$\text { Why does } \log _ { a } a \text { always equal } 1 \text { for any valid base a? }$$