Question

A1=-18 d=4 ариф.прог найти a=15​

Answer 1

a1=-18 d=4

an=a1+(n-1)d

a15=-18+14×4=38

Answer 2

To find the value of A15 in the arithmetic progression with A1 = -18 and d = 4, we can use the formula for the nth term of an arithmetic progression:

An = A1 + (n - 1) * d

Substituting the given values into the formula:

A15 = -18 + (15 - 1) * 4 = -18 + 14 * 4 = -18 + 56 = 38

Therefore, the value of A15 in the arithmetic progression is 38.