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Let f(x) be an increasing function defin...

Let `f(x)` be an increasing function defined on `(0,oo)` . If `f(2a^2+a+1)>f(3a^2-4a+1),` then the possible integers in the range of `a` is/are (a)`1` (b) 2 (c) 3 (d) 4

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