An equation is defined as x+y+x^5−y^5=0. a. Show that the equation determines y as a function of x in a neighbourhood of the origin (0,0). b. Denote the function from (a) by y=varphi(x). Find varphi^(5)(0) and varphi^(2004)(0). For the first part,I simply needed to prove that the equation is C^1 in the neighbourhood of the origin and that the first derivative w.r.t.y does not vanish at that point. These are the sufficient conditions for the existence of an implicit function in the neighbourhood of the origin. For the second part, I could do implicit differentiation (in a usual way) had it been for lower orders. But I need to learn the case for higher orders like the question asks. Please give me some hints.

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