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Let f(x)=x^2-2x-1 AA xinR Let f:(-oo, a]...

Let `f(x)=x^2-2x-1 AA xinR` Let `f:(-oo, a]->[b, oo)`, where a is the largest real number for which f(x) is bijective. If `f : R->R` , `g(x) = f(x) + 3x-1` , then the least value of function `y = g(|x|)` is

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