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

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(32388) (Show Source): You can put this solution on YOUR website!
Are you forgetting the ()?
I used instead of so I didn't confuse with .
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Start there, that should get you in the right direction.
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