1003107306

SubArea: 
Introduction to sequences
Level: 
B
Project ID: 
1003107306
Source Problem: 
1003107305
Accepted: 
1
Clonable: 
1
Easy: 
1
We are given a sequence \( \left( a_n \right)^{\infty}_{n=1} \) defined recursively by: \( a_1=1\,;\ a_{n+1}=2a_n,\ n\in\mathbb{N} \). Find the \( n \)th term of this sequence.
\( a_n=2^{n-1},\ n\in\mathbb{N} \)
\( a_n=2^n,\ n\in\mathbb{N} \)
\( a_n=2^{n+1},\ n\in\mathbb{N} \)
\( a_n=2^n-1,\ n\in\mathbb{N} \)