a₆ = 12, a₄ = 4, d - ?
a₄ + d + d = a₆
4 + 2d = 12
2d = 12 - 4
2d = 8
d = 8/2 = 4
ответ: d = 4
d=a2-a1=a3-a2=a4-a3=a5-a4=
a2=a1+d, a3=a2+d,a4=a3+d,
a6=12, a4=4, d=?
a6=a4+2d, 2d=a6-a4, 2d=12-4, 2d=8, d=8:2, d=4
Otvet: d=4
a₆ = 12, a₄ = 4, d - ?
a₄ + d + d = a₆
4 + 2d = 12
2d = 12 - 4
2d = 8
d = 8/2 = 4
ответ: d = 4
d=a2-a1=a3-a2=a4-a3=a5-a4=
a2=a1+d, a3=a2+d,a4=a3+d,
a6=12, a4=4, d=?
a6=a4+2d, 2d=a6-a4, 2d=12-4, 2d=8, d=8:2, d=4
Otvet: d=4