Evaluate the following expression.
\[
\log _{2}\left(\frac{1}{2}\right)
\]
Final Answer: \(\boxed{-1}\)
Step 1 :Evaluate the following expression: \(\log _{2}\left(\frac{1}{2}\right)\)
Step 2 :The logarithm base 2 of 1/2 is asking the question: '2 to what power equals 1/2?'
Step 3 :We know that 2 to the power of -1 equals 1/2.
Step 4 :Therefore, the answer should be -1.
Step 5 :Final Answer: \(\boxed{-1}\)