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Chapter 299 - 298: Captured
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Chapter 301 - 300: Bullying the Ghost Officer
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... ssing on Su Ran’s spine, and having to control his strength was tiring. Seeing that Su Ran took the initiative, he agreed.
"Listen carefully, elder. The known function f(x) = (1/x) -x. For any x∈(0, k), if f(x)f(k-x)≥[(k/2)-{2/k)] ^2 holds, what is the range of the real number k?"
"..."
Seeing the old man in the black robe pondering hard, Su Ran felt a little embarrassed...
"Ahem, elder, this hand?"
Su Ran pointed at his neck, hinting that he could let go ...
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