HO TH H Ố Y F X . N T CH S C A H NH H NG ( H N T TRONG H NH )A. 1...
7:
ho th h ốy f x
. n t chS
c a h nh h ng ( h n t trong h nh )A.1
( )
3
( )
d
d
S
= -
f x x
+
f x x
. B.1
( )
3
( )
S
=
f x x
-
f x x
.0
1
C.3
( )
d
S
=
ò
f x x
. D.1
( )
3
( )
S
=
f x x
+
f x x
.0