=ƒ () , .
ƒ¢¢()< 0.
=ƒ () , .
ƒ¢¢() > 0
. , , .
ƒ ¢¢()=0.
, ( ) . .
(, b) ƒ () > 0 (ƒ () <0), () .
(, b) ƒ ¢() > 0 (ƒ ¢() < 0), (, b) ().
(, b) ƒ ¢¢() > 0 (ƒ ¢¢() < 0), (, b) ().
ƒ()=0 , . . .
ƒ ¢()=0 .
ƒ ¢¢()=0 .
ƒ () =ƒ () :
1) ;
2) ;
3) ;
4) ;
5) ;
6) (, , ) .
. , .
ƒ () [ , b ].
1. ƒ ¢().
2. ƒ ¢()=0.
3. , [ , b ] ƒ () .
4. ƒ () : ƒ() ƒ(b).
5. () ().
2.
ƒ() = 392+2410 [0 3].
1. ƒ ¢() = 3 2 92 2 + 24.
2. Ģ()=0, 3( 26 +8)=0, 1=2, 2=4.
3. 2=4 [0, 3]. 1=2
ƒ(2)=23922+24210=10.
|
|
4. : ƒ(0)= 10, ƒ(3)=33932+24310, ƒ(3)=8.
5. :
ƒ(2)=10, ƒ(0)= 10, ƒ(3)=8.
10 =2. 10 =0.
3.
= +36 22 3 4.
, . . (∞, +∞).
. ¢=1+72 6 24 3.
¢¢=7212 12 2= 12( 2+ 6).
¢¢=0 : 12( 2+ 6)=0 1= 3; 2=2.
¢¢
(∞; 3), (3; 2), (2, +∞).
(∞, 3) | -3 | (3; 2) | (2; +∞) | ||
¢¢ | + | ||||
:
(3)=726; 1(3; 726)
(2)=114; 2(2; 114) .
(3; 2) . (∞; 3) (2; +∞) .
4.
.
1. ( , ), , .
2. .
.
¢ =0 : 3 ( 2)=0, 1=0, 2=2. .
(∞, 0) | (0; 2) | (2; +∞) | |||
¢ | + | + | |||
max | min |
3. , (∞, 0) (2, +∞), (0; 2), =0 =2:
max= (0)=4; min= (2)=0.
4. .
¢¢= 6( -1).
, ¢¢ < 0, . . 6( 1) < 0, < 1.
, ¢¢ > 0, . . > 1.
, (∞, 1) ; (1, +∞) .
5. ¢¢ =0. , =1 , .. . : (1)=2.
=( +1)( 2)2 =0, . . = 1 =2;
=0, . . =4. : (1; 0), (2; 0), (0; 4).
, .
2 | 1 | |||||||||
16 | 3 | |||||||||
max | min |
. 28 =(+1)(2)2.