SOLUTION: Find the fourth term in the expansion (3y-z)^7

SOLUTION: Find the fourth term in the expansion (3y-z)^7

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Question 324652: Find the fourth term in the expansion (3y-z)^7
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Here's Pascal's triangle row for the coefficients,
1 7 21 35 35 21 7 1
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