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Use Pascal's Triangle to complete the expansion of . ____
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Q. Use Pascal's Triangle to complete the expansion of . ____
- Pascal's Triangle Explanation: Pascal's Triangle gives us the coefficients for the expansion of a binomial. The th row (for the th power) is .
- Finding Coefficient for : The coefficient for is the second number in the th row of Pascal's Triangle, which is .
- Finding Coefficient for : The coefficient for is the fourth number in the th row of Pascal's Triangle, which is also , but we already have in the expansion, so this must be a mistake.
