P Q, , , d 1=MP d 2=MQ. , P, PQ. | ||
146 f (M) ( , 146), : | ||
147.1 | PQ, PQ. | |
147.2 | , QP. | |
ABCD a , d 1=MA, d 2=MB, d 3=MC, d 4=MD. , ( , BD). | ||
148 f (M) ( , 148), , ( , AD). | ||
f (x, y)= x 2+ y 2+6 x +8 y. , ( ) Β (3; 4). | ||
f (x, y)= x 2 y 216. , 45. | ||
f (x, y)= x 2+ y 2. , a. | ||
, f (x, y)= x 24 y 26 x +8 y +3=0 . | ||
, f (x, y)== x 24 xy +4 y 2+2 x + y 7 . | ||
, f (x, y)== x 22 xy + y 2+6 x +3 ? | ||
, ? |