Question

A1=7аn=26d=1 знайти n-?​

Answer 1

1) Формула нахождения n-го члена арифметической прогрессии:

aₙ=a₁+d(n-1)

d(n-1) = aₙ-a₁

d(n-1) = 26-7 = 19

n-1 = 19/d;

n-1 = 19

n = 20.

Ответ: 20

Answer 2

It looks like you've provided some variables (A1, a, n, and d) and you want to find the value of 'n' based on the given information. However, your equation or context isn't entirely clear. It seems like you might be dealing with an arithmetic sequence, where A1 is the first term, 'a' is the common difference, and 'd' might be another variable or just a notation.

If you're dealing with an arithmetic sequence where A1 is the first term, 'a' is the common difference, and 'n' represents the position of a term, then the formula to find the nth term would be:

An = A1 + (n - 1) * d

If this is the case, and you're looking to find 'n' based on the information given, you might need more information such as the value of A1 or the value of a (the common difference). Could you please provide more context or clarify the equation you're working with?