Trong các dãy số sau, dãy số nào là cấp số cộng?

Question

Cơ bản

4 câu trả lời

Answer 1

$\left\{\begin{matrix}u_{0}=1\\ u_{n}=2u{n-1}\end{matrix}\right.\forall n\geq 1$

Answer 2

$\left\{\begin{matrix}u_{0}=1\\ u_{n+1}=u_{n}+u_{n-1}\end{matrix}\right.\forall n\geq 1$

Answer 3

$\left\{\begin{matrix}u_{0}=1\\ u_{n}=u_{n-1}^{3}\end{matrix}\right.\forall n\geq 1$

Answer 4

$\left\{\begin{matrix}u_{0}=1\\ u_{n}=u_{n-1}+1\end{matrix}\right.\forall n\geq 1$