**Question:**

In the expansion \({\left( {3{x^2} โ y} \right)^{10}}\), the coefficient of the middle term is:

**Reference explanation:**

**Correct Answer: EASY**

In the expansion \({\left( {3{x^2} โ y} \right)^{10}}\) there are 11 terms in all, so the middle term is the th term.

So the coefficient of the middle term is \(- {3^5}.C_{10}^5\).

ADSENSE

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