Question

помогите с матешоооой

Answer 1

А1=2у+5; A2=y; А3=3у–8
d=A2–A1=A3–A2
y–2y–5=3y–8–y
–y–5=2y–8
–3y=–3
y=1
A1=2•1+5=7
A3=3•1–8=–5
d=A2–A1=1–7=–6
Ответ: при у=1