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What's the expansion of \((1+x)^n\)?

I'm supposed to find three consecutive coefficients of the expansion that have a ratio 1:7:35 and find n.

Thank you! All help is appreciated!

 Mar 30, 2020
 #1
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See the answer here:  https://web2.0calc.com/questions/help_73560

 Mar 30, 2020

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