Problem 16 of 7
Use combination notation to find binomial coefficient coefficient of a^4b in (a+b)^5.
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compute n choose k.
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Use n choose k for the term with second-term exponent k.
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Solution
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1. Identify exponent n of the binomial.
2. Identify k from the power of the second term or term position.
3. Compute n choose k.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Off-by-one term-position errors.