What is the coefficient of the 4th term (𝑥2𝑦3) in the expansion of (𝑥 − 3𝑦)5a. 270b. 190c. −270d. 720
Question
Solution 1
The coefficient of a term in the binomial expansion (a - b)^n can be found using the binomial theorem, which states that the coefficient is nCk * a^(n-k) * b^k, where nCk is "n choose k", a combination which can be calculated as n! / [k!(n-k)!].
In this case, we want the 4th term of the expansion o Knowee AI is a powerful AI-powered study tool designed to help you to solve study problem.
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