f g - x, F - f,
, k, C - .
51.
, ,
, , . , :
,
:
.
. , , . , .. . , , .
, , .
, .
, . .
:
. ; , :
.
. ; . :
.
, ; . :
.
52. , P (x) Q (x) - , :
(.. P (x) Q (x)), , ;
Q (x) / ;
, ;
.
1 | |
. . : : , | |
53 . (8)
- (8)
λ→0, τn [a; b] ξk, ( ) f(x) [a; b] :
, f(x) [a; b] ( ). f(x)dx , f(x) , , a b .
|
|
, , , , λ .
. y=f(x) [a; b] f(x) ≥ 0. , y=f(x), x=a, x=b (. 1), .
: , ( . 1). , τn [a; b] ξk.
, k=1, n, . , S λ→0:
, .
.
(a=b), :
.
f(x)=1,
, f(x)=1,
:
:
R.
[a; b] f1(x), f2(x), , fn(x) :
6. ( ). a, b, c;
7. f(x) ≥ 0 [a; b],
a < b.
8. ( ). f(x) φ(x) f(x) ≥ φ(x) [a; b],
a >b.
9.( ). m f(x), [a; b],
a < b.
10.( ). f(x) [a; b], [a; b],
. . ξ [a; b] b-a .
f(x) [a; b], [a; b],
. . ξ [a; b] b-a .
|
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54. . -
a b. a, , x [a; b], . :
x [a; b],
. t, .
. f(x) , :
-. - : [a; b] f(x) , x=b x=a.
- (9)
55 y = f (x) [ , t ], ..
t ≥ a. ( ) f (x) [ , +∞)
(9.1)
, (9.1), , ( ), .
:
) ;
) , .
.
(9.1) (-∞, b ]:
(9.2)
.
(-∞, +∞)
(9.3)
56. , y=f(x) [f(x) ≥ 0], x=a x=b [a; b] , :
, y=f1(x) y=f2(x)[f1(x) ≤ f2(x)] x=a x=b, :
x=x(t), y=y(t), , , x=a, x=b [a; b] , :
t1 t2 a=x(t1), b=x(t2) [y(t) ≥ 0 t1 ≤ t ≤ t2].
, , ρ=ρ(θ) θ=α, θ=β (α < β), :
57. y=f(x) [a; b] - (. . y=f(x) ), :
x=x(t), y=y(t) [x(t) y(t) ] , t t1 t2, :
ρ=ρ(θ), α ≤ θ ≤ β, :
. :
59. ́ ́ ; .
A B , , A B. A + B.
|
|
8. . W = {w 1, w 2, w 3, w 4, w 5, w 6}, w i - i . A - , A = {w 2,w 4,w 6}, B - , , B = {w 5, w 6}.
A + B = {w 2,w 4, w 5, w 6} , , , .. A, B. , A + B W.
A B , , A B. AB.
9. . W = {w 1, w 2, w 3,w 4, w 5,w 6}, w i - i . A - , A = {w 2,w 4,w 6}, B - , , B = {w 5, w 6}.
A B , , , .. , A B, A B = {w 6} A B W.
A B , A, B. A\B.
10. . A - , A = {w 2,w 4,w 6}, B - , , B = {w 5, w 6}. A\ B = {w 2,w 4} , , , .. A B, A\B W.
,
A + A = A, AA = A, .
:
, (A+B) C= AC + BC.
:
, , , ;
, , , .