f(x) [a, b], , : 1 2 [a, b] - a, 0 £ a £ 1
. (2)
f() [; b], , : 1 2 [; b] - a, 0 £ a £ 1
. (3)
. .
. f () [ a, b ]. ,
.
1 2 [ ; b ].
: (; ) , ( 1; f (x 1)) ( 2; f (x 2)), , (a 1 + (1 a) 2; a f (x 1) + (1 a) f (x 2)) , ,
,
.
. (2). ,
, - ( 1; 1) ( 1; 2) , 1 ³ f (x 1), 2 ³ f (x 2), (a 1 + (1 a) 2; a 1 +(1 a) 2) 0 £ a £ 1.
, = a 1 + (1 a) 2; = a 1 +(1 a) 2 (1)
, .
. f () , f () (1):
,
.
(2) (3). , (2) (3).
. 1. f () [ a; b ] (), - 1 2 [ a; b ] - a, 0 £ a £ 1,
2. f (x) [ a, b ] ( ), - 1 2 [ a, b ], 1 ¹ 2, - a, 0 < a < 1,
. 5.25 . 5.26
(2) , , f (x), . , f (x) , - ( 1; f (x 1)) ( 2; f (x 2)), 1 < x < x 2, , , > f (x).
f (x), , (; ) , ( 1; f (x 1)), ( 2; f (x 2)) = f (x) < f (x).
. 5.25 5.26 .
˳ f (x) = x + b ( ), (1) (2), .
, f (x) = x 2 .
|
|
● , 1 2 , 1 ¹ 2.
, (1) f (x) = x 2 ; x 1 = x 2
0 < a < 1 , f (x) = x 2 .
.