SOLUTION: In the expansion of (1 + 1/6x) to the power n, n belongs to N, n>8 the coeffient of x to the power 7 and x to the power 8 are equal find n. I have tried n(n-1)....(n-6) (1) to t

Algebra ->  Algebra  -> Sequences-and-series -> SOLUTION: In the expansion of (1 + 1/6x) to the power n, n belongs to N, n>8 the coeffient of x to the power 7 and x to the power 8 are equal find n. I have tried n(n-1)....(n-6) (1) to t      Log On

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 Click here to see ALL problems on Sequences-and-series Question 328502: In the expansion of (1 + 1/6x) to the power n, n belongs to N, n>8 the coeffient of x to the power 7 and x to the power 8 are equal find n. I have tried n(n-1)....(n-6) (1) to the power n-7 all over 7! and n(n-1)....(n-7)(1) to the power n-8 all over 8! 1 = n-7 over 8 8 = n-7 n=15 Answer by Fombitz(13828)   (Show Source): You can put this solution on YOUR website!Are you forgetting the ()? I used instead of so I didn't confuse with . . . . . . . Start there, that should get you in the right direction.