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If x = 1 + 3a + 6a^2 + 10 a^3 + ……" to " oo terms |a| lt 1, y = 1+4a+10a^2 + 20a^3 + ….." to " oo terms, |a| lt 1, then x:y |
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Answer» `(1 - a):1` |
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