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If f(x) =(2x+1)/(2x^3+3x^2+x) and S={x:f...

If `f(x) =(2x+1)/(2x^3+3x^2+x)` and `S={x:f(x)>0}` then S contains (a) `(-oo,-3/2)` (b) `(-3/2,-1/4)` (c)`(-1/4,1/2)` (d) `(1/2,3)`

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