Question: If the number of terms in the expansion of $(x - 2y + 3z)^{n}$ is 45, then $n =$...

Question

If the number of terms in the expansion of $(x - 2y + 3z)^{n}$ is 45, then $n =$

Answer 1

Given, total number of terms = $\frac{(n + 1)(n + 2)}{2} = 45$

⇒ $(n + 1)(n + 2) = 90$ ⇒ $n = 8$ .

Question: If the number of terms in the expansion of \((x - 2y + 3z)^{n}\) is 45, then \(n =\)...