Question

Срочно!!!!А1=-3а25=45Найти: d-?​

Answer 1

aₙ = a₁ + d(n-1)

45 = -3 +24d

d = 48/24 = 2

Answer 2

а25=а1+24d

a25-a1=24d

48=24d

d=2

Answer 3

It seems like you have a mathematical expression or equation that you need help with. However, there seems to be some confusion in the notation you provided. The variables "а1" and "а2" are not properly defined, and the equation lacks an operation or relation between them. Additionally, the variable "d" is mentioned without any context or equation in which it appears.

If you can provide more information or clarify the equation, I'd be happy to help you solve it. Please make sure to state the problem clearly and include all relevant details and equations.