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Рубрика:
˙y + y
2
= x
2
y
(4)
+4y = t
2
,y(0) = 0, ˙y(0) = 1, ¨y(0) = 2,y
(3)
(0) = 3
4y
(3)
−8y
(2)
−2˙y =8e
t
,y(0) = 1, ˙y(0) = 1, ¨y(0) = 1
y
(3)
−6y
(2)
+11˙y −6y =0,y(0) = 0, ˙y(0) = 0, ¨y(0) = 10
y
(4)
+2y
(2)
= t sin t, y(0) = 0, ˙y(0) = 10, ¨y(0) = 0.1,y
(3)
(0) = 0.01
⎧
⎨
⎩
¨x − x +2y =0,x(0) = 0, ˙x(0) = −1
¨x − 2y =0,y(0) = 1/2
V (P )=V
0
(1 + 2λ(P )) λ(P )=
P
H
−P
P
H
−P
atm
H = 500m P
H
H P
atm
f =
ρv
2
2
S ρ v S
