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Question 297 of 519MediumMCQ
If ∣x∣<1|x|<1, ∣y∣<1|y|<1, and x≠yx\ne y, then the sum to infinity of the series (x+y)+(x2+xy+y2)+(x3+x2y+xy2+y3)+⋯(x+y)+(x^2+xy+y^2)+(x^3+x^2y+xy^2+y^3)+\cdots is:
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