The solution set of \( x^{2}+2 \leq 3 x \leq 2 x^{2}-5 \) is (A) \( \phi \) (B) \( [1,2] \) (C) ...
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The solution set of \( x^{2}+2 \leq 3 x \leq 2 x^{2}-5 \) is
(A) \( \phi \)
(B) \( [1,2] \)
(C) \( (-\infty,-1] \cup\left[\frac{5}{2}, \infty\right) \)
(D) None of these
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