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Fall 2021 AMC 10 B

United States 2021 algebra

Problem

Let . Which of the following is equal to ? (A) (B) (C) (D) (E)
Solution
Answer (E): Note that , so Thus

All the other choices are less than . Choices (A) and (D) have the same base but a lesser exponent. Choice (B) is incorrect because . Choice (C) is incorrect because
Final answer
E

Techniques

Exponential functions