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4. . -




[ a, b ] (b > a) y = f (x), : . S ABCD, [ a, b ], - x = a x = b, y = f (x).

AD x 0 = a, x 1 , x 2 , , xn -1 = a, xn = b n [ x 0 , x 1], [ x 1 , x 2], , [ xi -1 , xi ], , [ xn -1 , xn ]; i - : . [ xi -1 , xi ] , , ( Pi [ xi -1 , xi ] ) . S : .

S , Pi, i = 1,2,, n; . S S, S. , , n , ( n = 7 () n = 14 ()). S S , ..
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[ a, b ] y = f (x). [ a, b ] n [ x 0 , x 1], [ x 1 , x 2], , [ xi -1 , xi ], , [ xn -1 , xn ]; i - : ; . [ xi -1 , xi ] .
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, [ a, b ] [ xi -1 , xi ], , f (x) [ a, b ] , f (x) , a b - , .

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:

1. , b=a.

2. .

3. .

4. y = f (x) [ a, b ] c , .

5. , f (x), g (x) [ a, b ], .

6. [ a, b ] , .

7. f (x) [ a, b ], .

8. ( ) f (x) [ a, b ], , .

. f (x) >0 [ a, b ], ABCD, [ a, b ], - x = a x = b, y = f (x).

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f (x) [ a, b ], F (x) - , .





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