Difficulty: Easy
Correct Answer: 4097/64
Explanation:
Introduction / Context:
Rational exponents allow us to rewrite powers in terms of roots. 16^(3/2) is the cube of the square root (or the square root of the cube) of 16. Similarly, negative exponents indicate reciprocals. Combine these properties to obtain an exact fractional sum.
Given Data / Assumptions:
Concept / Approach:
Compute each term separately: 16^(3/2) = (16^(1/2))^3 = 4^3 = 64. For the negative exponent, 16^(−3/2) = 1 / 16^(3/2) = 1/64. Then add the two values and convert to a single fraction.
Step-by-Step Solution:
Verification / Alternative check:
Compute numerically: 64 + 0.015625 = 64.015625 = 4097/64. Matches.
Why Other Options Are Wrong:
Common Pitfalls:
Confusing 16^(3/2) with (16^3)^(1/2) without carefully evaluating; both are 64, but ensure steps are consistent. Do not forget the reciprocal for the negative exponent.
Final Answer:
4097/64
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