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Q58Section I (Objective (Q1–Q80))58 of 80

Numerical Analysis — geometric series product

If −1<x<1-1<x<1, then what is the product (1+x+x2+x3+… )(1−x+x2−x3+… )(1+x+x^2+x^3+\dots)(1-x+x^2-x^3+\dots) equal to?

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