. z = f(x, y), , 0(0, 0)
0 .
. z = f(x, y), , 0(0, 0)
0 .
. ( ).
f(x,y) (0, 0) , , .
(0, 0) .
. ( ).
(0, 0) f(x, y) . :
1) D(x0, y0) > 0, (0, 0) f(x, y) ,
- , - .
2) D(x0, y0) < 0, (0, 0) f(x, y)
, D = 0, .
: |
. z = f(x, y), , 0(0, 0) 0 . . z = f(x, y), , 0(0, 0) 0 . . ( ). f(x,y) (0, 0) , , . (0, 0) . . ( ). (0, 0) f(x, y) . : 1) D(x0, y0) > 0, (0, 0) f(x, y) , - , - . 2) D(x0, y0) < 0, (0, 0) f(x, y) , D = 0, .
: 2015-05-07; !; : 502 | : : , , . |