xz = y - k, xz= k.
x, y, × = k Þ = . .
. , = , k , 0 .
:
1. D (y) = ( ∞; 0) È (0; + ∞;) = R \ {0} (x )
2. E (y) =( ∞; 0) È (0; + ∞;) R \ {0} (.. k ¹ 0)
3. f (- x) = = f (x), , .
4. k >0, ;
k < 0, .
5. .
k > 0 k < 0
1. , (, ) .
2. , , ..
.
, :
() () ( ).
. , = 2 + b + , , b, ¹ 0.
D R, 2 + b + .
, (, b, ) = (1, 0, 0), .. = 2.
= 2 :
1. D (y) = R = ( ∞; + ∞).
2. E (y) = [0; +¥) = R +.
3. f (- x) = ( x)2 = x2 = f (x), , .
4. , , .
x 1 > x 2 0 f (x 1) f (x 2).
f (x 1) - f (x 2) = . x 1 > x 2, > 0 f (x 1) > f (x 2) .
x 1 < x 2 0 f (x 1) f (x 2).
f (x 1) - f (x 2) = . x 1 < x 2, > 0 f (x 1) > f (x 2) .
5. = 0 .
Ÿ , .
= 2.
> 0 , = 2.
= 2
|
|
, > 1 ,
0 < < 1. .
.
= 2 < 0 = 2 .
= 2 + b + . .
= 2 + b + = ( 2 + ) + = + + = + .
= = 2. = 2 , > 0 , < 0. , = 2 .