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For some real number \(a\) and some positive integer \(n\) the first few terms in the expansion of \((1 + ax)^n \) are

\(1 - 12x + 54x^2 + cx^3 + \dotsb \)

Find \(c\).

 

Please help ASAP... thanks so much!

 Jan 9, 2024
 #1
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This is AoPS homework.  Do not post AoPS homework.

 Jan 9, 2024

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