If 3^x = 81, what is the value of 2^(2x – 3)?
A8
B16
C32
D64
Explanation
3^x = 3^4 => x = 4. Then 2^(2(4) – 3) = 2^(8 – 3) = 2^5 = 32.
Exam Relevance
- Topic: Algebra
- Subtopic: Exponents and Indices
No Comments