, a < b.
1. . : f (x)=1, = .
2. . . , 1, 2,..., x i . , .. D i = xi xi 1> 0, D i = xi 1 xi < 0, . , [ a, b ] a b.
3. . . , .
.
4. a, b, c, . , [ a, b ].
[ a, ] [ , b ], , . [ a, b ], , , > b, [ a, ] : , . .
5. .
6. . .
7. g (x) £ f (x) [ a, b ], £ .
, f (x) ³ 0 [ a, b ], ³ 0;
f (x) > 0, > 0.
, f (x) £ 0 £ 0,
f (x) < 0, < 0.
.
, f (x) £ 0. , f (x) £ 0, g (x) = f (x) ³ 0 [ a, b ], , , , , . ( 2), .. S 1 = S 2
, 4, S 2 = S 1 = = . .. , , , .
3, : f (x) [ a, b ] , , , , , , , (.3):
+
|
|
8. [ a, b ] £ f (x) £ , (a b) £ £(a b). 7 1.
9. . .
10. . f (x) , g (x) [ a, b ], $ Î[ a, b ] ,
f (x) [ a, b ] , g (x) ³ 0.
£ f (x) £ ,
g (x) £ f (x) g (x) £ g (x),
.
, g (x) . 7 > 0 . f (x) [ a, b ], - . , Î[ a, b ] ,
f () = , .
g (x) = 0 [ a, b ], , , : 0 = f ().0 " Î[ a, b ].
g (x) = 1,
f () =
, f () f () [ a, b ].
: = [ a, b ], f () (b ) b (.4)