If f(x) =∫(x8+4)/(x4-2x2 +2)dx andf(0)=0 then
  1. F(x) is an odd function
  2. F(x) has range R
  3. F(x) has at least one real root
  4. F(x) is a monotonic function
Kindly explain to me how all the options are correct

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