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Let f(x) be defined for any positive integer x greater than 2 as the sum of all prime numbers less than x. For example, f(4)=2+3=5 and f(8)=2+3+5+7=17. What is the value of f(86)−f(82)? (A) 3 (B) 4 (C)
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Jan 8, 2021
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Let f(x) be defined for any positive integer x greater than 2 as the sum of all prime numbers less than x. For example, f(4)=2+3=5 and f(8)=2+3+5+7=17. What is the value of f(86)−f(82)? (A) 3 (B) 4 (C) 47 (D) 59 (E) 83
Mathematics
high-school
Ceekay
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Answer:
The answer is B
Luna
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Jan 12, 2021
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