Question 8.

Let 3x63 \leq x \leq 6 and [x2]=[x]2[x^2] = [x]^2, where [x][x] is the greatest integer not exceeding xx. If set SS represents all feasible values of xx, then a possible subset of SS is .

A
(4,18)[5,27){6}(4, \sqrt{18}) \cup [5, \sqrt{27}) \cup \{6\}
B
[3,10][5,26][3, \sqrt{10}] \cup [5, \sqrt{26}]
C
[3,10][4,17]{6}[3, \sqrt{10}] \cup [4, \sqrt{17}] \cup \{6\}
D
(3,10)[5,26){6}(3, \sqrt{10}) \cup [5, \sqrt{26}) \cup \{6\}

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