Kiểm tra đại 8 - tiết 36



 !
"#
I. L thuyt(2 đim):
$%!&'()(!*++,-!.++/01(!.+2%+(3
456
7
 
 7 
x
x x x
+
+
+ +
B. Bi tp(8 đim):
Bi 1(2 đim):809!.+&:!

7
7
7 
7  
D x x
x x x
−
=
− − +
Bi 2(3 đim):;+<=!>

7
7 7

    7
 7  7   
x x x
x x x x x
+ + −
 
− + ×
 ÷
− + − −
 
Bi 3?3 đim@AB-!.+
AC
( ) ( ) ( )
( ) ( )
7
7
   
 
x x x
x x
+ − − −
− −
@809"(2<+DE9'A+/FG
&@ !H-!.+AG
+@80%!IJ+DE9'%!IJ+D-!.+&K#
5@80%!IJ(LM+DE9'A+/%!IJ(LMG
"#
I. L thuyt(2 đim):
$%!&'()(!*+--!.+9NOP3
456

( )
7
7  
? @

x x
x
x
− −
×
−
−
B. Bi tp(8 đim):
Bi 1(2 đim):809!.+&:!

7 7
7
7   
E x
x x x x
+
=
+ + +
Bi 2(3 đim):;+<=!>

7
7 7
    7
 7  7   
x x x

x x x x x
− − −
 
+ − ×
 ÷
+ − − +
 
Bi 3?3 đim@AB-!.+
C
( ) ( ) ( )
( ) ( )
7
7
   
 
x x x
x x
− − − −
+ −
@809"(2<+DE9'+/FG
&@ !H-!.+G
+@80%!IJ+DE9'%!IJ+D-!.+&K#
5@80%!IJ(LM+DE9'+/%!IJ(LMG