= f () 0 0:
y¢
- ;
- .
4.2.
f() 0 , = f () 0, ¢ = tg a, a .
= f(), (0, 0) :
0 = f ¢ (0) ( 0),
k =tg a 0 .
0. S, t. Dt D S D t. , Dt 0, . :
V = S¢ = .
.
, . . .
( function elasticity) - y/ /, 0 0. () :
()=
4.5.
() .
= f() , . d D. :
dy = f ¢(x)× dx.
1. () u = u() v = v() () :
(u¢ v¢) = u¢ v¢
2. c - :
(c u)¢ = u¢
3. u = u() v = v () :
(uv)¢=u¢ v+u v¢
4. :
=f (u), u = u (), y = y{u ()}- , :
y¢x = y¢u u¢x
|
|
:
= (2 +5)3
: = u3, u = 2 + 5,
¢u = 3u2 u¢x = 2, :
¢ = 3u2 2 = 3(2 + 5)2 2.
4.8. , .
= f () t, = (t) =(t). t t:
¢x =
4.9. .
, . F(,) = 0. , . ¢. ¢.
¢ 2 + 2 = 5
:
2 + 2 ¢= 0, , ¢ = - / .