3.5.(I - )
f (x) [ a; b ] , , :
f (c) = 0, a < c < b.
: , , , (.11).
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, , . , , [1; 1]
3 +5 +2 = 0.
f (x) = 3 +5 +2. , f (c) = 0. f (1) = 4, f (1) = 8, , 3.4, [1; 1] , .. Î[1; 1].
: [1; 0] [0; 1]. f (0) = 2, , , Î [1; 0]. [1; 0] , , .
, , . ().
3.6.(II - )
f (x) [ a; b ] : f (a) = A, f (b) = B, A ≠ B, , , Î[ a; b ] , f (c) = C.
, , , .
, 3.5. 3.6.
3.7.()
f (x) [ a; b ], , .. $ 1, 2Î[ a; b ]: f (c 1) = m, f (c 2) = M m £ f (x) £ M " Î [ a; b ].
[ a; b ] .
3.8.
f (x) , () [ a; b ], f 1(x), () .
4
3.5.
L , , M(x, y) , L .
3.6.
x = a y = f (x), f (a + 0) f (a 0) .
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, y = f (x) x = a, (II ) .
3.7.
y = kx + b y = f (x) x +¥ (-¥),
, k = 0 .
3.9.
y = f (x) y = kx + b x +¥(-¥), ,
b = .
.
: .
: D(y) = (-¥;0)È(0;¥), , x = 0 . . :
, ,
, x = 0 , , x = 0 ().
. :
,
.
, x +¥ = 0,5 , , = 0,5 , x ¥ .
, = 0,5 ( , .. x ¥, x +¥).
: