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PrintFall 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
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