v(t) = S'(t)
S(t) = 2t² + at + C
S(2) - S(0) = 2*2² + 2a + C - C = 48
8 + 2a = 48
2a = 40
a = 20
ответ: 20
v(t) = S'(t)
S(t) = 2t² + at + C
S(2) - S(0) = 2*2² + 2a + C - C = 48
8 + 2a = 48
2a = 40
a = 20
ответ: 20