ĐỀ CƯƠNG ÔN TẬP TS 10
MÔN TOÁN LỚP 9
NĂM HỌC 2012- 2013
A. BIẾN ĐỔI ĐẠI SỐ VÀ TÍNH TOÁN:
Tìm điều kiện căn thức có nghĩa và tính giá trị:
Bài 1: cho biểu thức A =
tìm điều kiện của x để A có nghĩa.
Tìm giá trị của x để A= 5
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Bài 2: cho biểu thức B =
tìm điều kiện của x để B có nghĩa.
Tìm giá trị của x để B= 2
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Rút gọn và tính giá trị của biểu thức:
Bài 1: cho biểu thức A =
rút gọn biểu thức A
tính giá trị của A khi x = 9
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Bài 2: cho biểu thức B =
rút gọn biểu thức B
tính giá trị của B khi x = 4
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rút gọn biểu thức:
Bài 1: rút gọn các biểu thức sau:
a) b)
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Bài 2:rút gọn các biểu thức sau:
a) b) A=
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chứng minh đẳng thức:
chứng minh = 4 b)
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giải phương trình:
a) b)
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c) d)
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bài tập tổng hợp:
1) cho biểu thức P =
a) rút gọn biểu thức P
b) tính giá trị của P khi x =
c) tìm các giá trị của x đề P > 2
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7. Bài tập tự luyện;
Bài 1. tính :
a) b)
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Bài 2: với giá trị nào của x thì các biểu thức sau có nghĩa:
a) b) B= c) C =
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Bài 3:tính
a) b)
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c) d)
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Bài 4:TÍNH
a) A = b) B=
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c) C= )
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Bài 5:rút gọn biểu thức rồi tính giá trị của biểu thức: M = với x = 3
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Bài 6:tính:
a) b) với a =
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........................................................................................................................................................................ ................................................................................................................................................................................................................................................................................................................................................
........................................................................................................................................................................ ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................c) vơi a = d) (x> 0),x =
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Bài 7:giải các phương trình sau:
a) b)
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c)
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Bài 8: tính
C = D =
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Bài 9: khử căn ở mẫu số:
1) 2) 3) với a>0

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Bài 10:trục căn thức ở mẫu số:
1) 2) 3)
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4) 5) 6)
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Bài 11: tính
1) A= 2) B=
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3) C=
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Bài 12:cho biểu thức:
A =
1) rút gọn A
2) tìm a đề A > 1
3) tính giá trị của A nếu
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