Math, asked by rameshbsbdvt, 7 months ago

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Answered by srijansarvshresth135

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use the formula .,

$Lim \: x - > \alpha \: \frac{ {x}^{n} - {a}^{n} }{x - a} =n {a}^{n - 1} \\ \: so \: we \: get \:a = 2 \\ n {2}^{n - 1} = 80 \\ we \: get \: n = 5$

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