1000 . P(t)=1000 + , t . .
.
D(P)=R
P(t)= = =
P(t)=0
100-t2=0
t=
P(10)=1000+ =1005
: 10 1005 .
. , R.
.
, . r,
+=R
y=R-x
r- , [0;R]
F(x)=
D(f)=R
f(x)=
f(x)=0, x=
f(0)=0, f(R)=0, f()= =
: .
- .
1.
5 , 4. , 2 /2. , 2?
t y(0)= 4, x(t) .
y(t) : , .
t: y(t) = 2, .. 2 = 4 - t2, ;
. , ..
: