Интегральное исчисление. Определенный интеграл - 29 стр.

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fg
i
x
0
x
00
|f(x
0
)g(x
0
) f(x
00
)g(x
00
)| =
= |f(x
0
)g(x
0
) f(x
0
)g(x
00
) + f(x
0
)g(x
00
) f(x
00
)g(x
00
)|
|f(x
0
)||g(x
0
) g(x
00
)| + |g(x
00
)||f(x
0
) f(x
00
)|
M
³
ω
f
i
+ ω
g
i
´
.
[a, b] [a, b]
f
2
f
f(x) =
1, x ,
1, x ,
a x b,
[a, b] f
2
(x) = 1
f R [a, b] [c, d] [a, b] f R [c, d]
ε > 0 f R [a, b]
δ > 0 T [a, b]
< δ
T
0
[c, d]
< δ T [a, b]
i ω
i
x
i
X
0
ω
i
x
i
X
ω
i
x
i
,