Let 2f(x^2)+3f(1/ x^2)=x^2-1 for all x ...

Let `2f(x^2)+3f(1/ x^2)=x^2-1 ` for all `x in R-{0}.` Then f(x) equals (i) `(3-x-2x^2)/(5x)` (ii) `(3-x-2x^2)/(15x)` (iii)` (5-x-2x^2)/(5x)` (iv) none of these

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