Let f : ( 2,oo) -> N be defined by f(x...

Let `f : ( 2,oo) -> N` be defined by `f(x)=` the largest prime factor of `[ x ]` . Then `int_2^8 f(x) dx` is is equal to (A) 17 (B) 22 (C) 23 (D) 25

A

17

B

22

C

23

D

25

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The correct Answer is:

B

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