Question

Какой из них арифметическая прогрессия : an=5-3n bn=n2-4n cn=n÷(n+1)

Answer 1

Второе
bn=n2-4n
 другое не потходит         

Answer 2

Identifying Arithmetic Progression

The given sequences are: - \( a_n = 5 - 3n \) - \( b_n = n^2 - 4n \) - \( c_n = \frac{n}{n+1} \)

To determine which of these sequences is an arithmetic progression, we need to check if any of them follow the form of an arithmetic progression, which is given by the formula \( a_n = a_1 + (n-1)d \), where \( a_1 \) is the first term and \( d \) is the common difference.

Let's analyze each sequence: 1. \( a_n = 5 - 3n \) 2. \( b_n = n^2 - 4n \) 3. \( c_n = \frac{n}{n+1} \)

Analysis of Sequences

- Sequence \( a_n = 5 - 3n \) does not follow the form of an arithmetic progression. - Sequence \( b_n = n^2 - 4n \) also does not follow the form of an arithmetic progression. - Sequence \( c_n = \frac{n}{n+1} \) does not follow the form of an arithmetic progression.

Based on the analysis, none of the given sequences \( a_n \), \( b_n \), or \( c_n \) represent an arithmetic progression.

This conclusion is based on the analysis of the given sequences and their conformity to the formula for an arithmetic progression.