SOLUTION: find the coefficient of x of the expansion (sqrt(x)-3/sqrt(x))^8

SOLUTION: find the coefficient of x of the expansion (sqrt(x)-3/sqrt(x))^8

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Question 1104786: find the coefficient of x of the expansion (sqrt(x)-3/sqrt(x))^8
Answer by greenestamps(13214) (Show Source): You can put this solution on YOUR website!

The expression is

The x term in the expansion will be obtained when the first term is used 2 more times than the second term:

So the binomial formula tells us the coefficient is

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