Question

Выписаны первые несколько членов арифметической прогрессии: -17;-14;-11. найдите 81-й член этой прогрессии

Answer 1

Во оооо т тебе реееешениеее

Answer 2

Finding the 81st Term of an Arithmetic Progression

To find the 81st term of the given arithmetic progression, we can use the formula for the nth term of an arithmetic progression:

nth term (Tn) = a + (n - 1)d

Where: - a = the first term - n = the term number - d = the common difference

Given the first few terms of the arithmetic progression: -17, -14, -11, we can identify: - a = -17 - d = -14 - (-17) = 3

Now, we can calculate the 81st term using the formula.

Calculating the 81st Term

Using the formula for the nth term of an arithmetic progression, we have: T81 = -17 + (81 - 1) * 3

Calculating: T81 = -17 + 80 * 3 T81 = -17 + 240 T81 = 223

Therefore, the 81st term of the given arithmetic progression is 223.