O x
y
(C)
(C’)
M(x
0
;y
0
)
y
0
x
0x
y
(C)
(C’)
M(x
0
;y
0
)
y
0
x
0


y = g(x), (C’ )
M(x
0
;y
0
)
y
0
M(x;y) lµ ®iÓm chung cña (C) vµ (C’)
x
0
M(x;y) ∈(C) : y = f (x)
M(x;y) ∈(C’ ) : y = g (x)
=>x vµ y lµ nghiÖm cña hÖ täa ®é ®iÓm chung cña (C) vµ (C’)
y = f (x)
y = g(x)
Hoµnh ®é ®iÓm chung M cña (C) vµ (C’) lµ nghiÖm cña
pth®®c: f(x) = g(x)
1.Bµi to¸n 1: T×m giao ®iÓm cña hai ®­êng