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If d/(dx)((1+x^2+x^4)/(1+x+x^2))=a x+b ,...

If `d/(dx)((1+x^2+x^4)/(1+x+x^2))=a x+b ,` then the value of a and b are respectively. 2 and 1 (b) `2a n d-1` (d) None of these

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