9. 1.1.
x
y, , x
y = y (x) y = f (x).
1.2. 4 :
1. f, .. x y=f(x)
2. () : y=∣sin(x)∣y=
3. -- , -- (f) .
1.3 f(x) a , ε > 0 δ = δ(ε) > 0 , |f(x) f(x)| < ε.
10. 1.1. b () f (x) a,
a ,
() a,
b. .
1.2. b f (x) x → ∞,
b. b f (x) x → +∞ ( x → -∞ ),
,
, , (),
b.
11. 1.1. f (x) x = a ( x → ∞),
( x → ∞) .
1.2. f (x) x → +∞ ( x → -∞ ), { xn } x,
(),
{ f (xn)}
.
12. 1.1. . .
x = 0 : (1)
(1) .
13. 1.1.
. x →∞ e:
: .
14. 1.1. f (x) a,
a f (a), ,
1.2. ,
.
1.3. f (x) x = a, , f (x) .
|
|
1.4. . a ,
f (x) , : .
, f (x) = / x x =0 .
, ,
. a ,
f (x) , ,
, .
, x = 0.
, x = 0 .
f (x) = tg x x = ,
15. 1.1. .
.
,
. , sin(ln x)
sin u u = ln x.
,
. x = (t)
.
y = f (x), , t
y = f (x) = f ( (t)) = F (t).
. x = (t) t = a, y = f (x)
x = b = (a), t = a, F (t) a.
16. 1.1. f (x) ()
, x1 x2 , x1 < x2,
f (x1) ≤ f (x2) (f (x1) ≥ f (x2)).
.
1.2. x = (y) y = f (x).
1.3.
17. 1.1. ,
.
, .
, .
18. 1.1. , 0.
1.2. . x(t), :
. x 0 y = f(x) .
1.3.
y x. x , y . . .
|
|
, , .
20. 1.1. ,
.
(Cf (x))`= Cf `(x),
(f (x) g (x))`= f `(x) g `(x),
(f (x) g (x))`= f `(x) g (x) + f (x) g `(x),
(f (x) / g (x))`= (f `(x) g (x) - f (x) g `(x)) / g 2 (x).
21. 1.1. x = (t) t 0,
y = f (x) x 0 = (t 0). y = f ( (t)) = F (t)
t 0
F (t 0) = f ( (t 0)' = f ' (x 0) (t 0).
22. 1.1. .
y = f (x) x.
ln y = ln f (x). y = f (x)
,
(ln y)`= y ` / y.
1.2. y = f (x)
.
, Ex (y) , , x
y = f (x).