Kiểm tra ĐS 8 chương 1
Chia sẻ bởi Mai Ngọc Lợi |
Ngày 12/10/2018 |
47
Chia sẻ tài liệu: Kiểm tra ĐS 8 chương 1 thuộc Đại số 8
Nội dung tài liệu:
Trường THCS Ba Đồn BÀI KIỂM TRA ĐẠI SỐ -LỚP 8
Thời gian 45 phút
ĐỀ CHẴN
Họ tên học sinh:.....................................................................Lớp 8......
Điểm
Lời phê của thầy, cô giáo
…………………………………………………………………………
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…………………………………………………………………………
Bằng số
Bằng chữ
Chữ ký:
Đề bài:
Câu 1 : (1,5đ) Làm tính nhân
a) 2x2 .(3x – 5x3) b) (x + 3).(x2 – 6x +9)
Câu 2 (1,0đ) Viết công thức tổng quát của hằng đẳng thức:
a) Bình phương của một tổng. b) Lập phương của một tổng.
Câu 3 (1,0đ)
a) Khai triển (2x + 3)2 b) Tính nhanh: 1172 + 172 – 34.117
Câu 4 (2,25đ) Phân tích các đa thức sau thành nhân tử:
a) 3x3 + 6x 2 +3x b) a2 – 6a – 4b2 + 9
Câu 5 (1,5đ) Tìm x, biết: (x – 5)2 – (3x – 7)2 = 0
Câu 6 (1,25đ) Làm tính chia:
a) 6x2y : 3xy b) (12x6y5 – 3x3y4 + 4x2y) : 6x2y
Câu 7(1,5đ)
a/ Tìm a để đa thức (x3 + 3x2 + 5x + a) chia hết cho đa thức (x + 3)
b/ Chứng minh rằng : 4x – x2 – 7 < 0 (Với mọi giá trị x )
Bài làm
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Trường THCS Ba Đồn BÀI KIỂM TRA ĐẠI SỐ -LỚP 8
Thời gian 45 phút
ĐỀ LẼ
Họ tên học sinh:.....................................................................Lớp 8......
Điểm
Lời phê của thầy, cô giáo
…………………………………………………………………………
…………………………………………………………………………
…………………………………………………………………………
Bằng số
Bằng chữ
Chữ ký:
Đề bài:
Câu 1: (1,5đ) Làm tính nhân .
a) 3x2 .(4x – 5x3) b) (x + 2).(x2 – 2x +4)
Câu 2 (1,0đ) Viết công thức tổng quát của hằng đẳng thức:
a) Bình phương của một hiệu. b) Lập phương của một hiệu
Câu 3 (1,0đ)
a) Khai triển (3x + 2)2 b) Tính nhanh: 1292 + 292 – 58.129
Câu 4 (2,25đ) Phân tích các đa thức sau thành nhân tử:
a/ 3x3 – 6x2 +3x b/ x2 + 6x – 4y2 + 9
Câu 5 (1,5đ) Tìm x, biết: (x – 1)2 – (2x – 3)2 = 0
Câu 6 (1,25đ) Làm tính chia:
a) 8xy2: 4xy b) (18x6y – 4x3y5 + 6x2y6) : 6x2y
Câu 7(1,5đ)
a/ Tìm a để đa thức (x3 + 4x2 + 6x + a) chia hết cho đa thức (x + 3)
b/ Chứng minh rằng : 6x – x2 – 11 < 0 ( Với mọi giá trị x )
Bài làm
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ĐÁP ÁN VÀ BIỂU ĐIỂM
Đề 1
Câu
Nội dung
Điểm
1
a) 2x2 .( 3x – 5x3) = 6x3 – 10x5
b) (x + 3).( x2 – 6x +9)
= x.( x2 – 6x +9) +3.( x2 – 6x + 9)
= x3 – 6x2 +9x +3x2 – 18 x + 27
= x3 – 3x2 – 9x + 27
0,
Thời gian 45 phút
ĐỀ CHẴN
Họ tên học sinh:.....................................................................Lớp 8......
Điểm
Lời phê của thầy, cô giáo
…………………………………………………………………………
…………………………………………………………………………
…………………………………………………………………………
Bằng số
Bằng chữ
Chữ ký:
Đề bài:
Câu 1 : (1,5đ) Làm tính nhân
a) 2x2 .(3x – 5x3) b) (x + 3).(x2 – 6x +9)
Câu 2 (1,0đ) Viết công thức tổng quát của hằng đẳng thức:
a) Bình phương của một tổng. b) Lập phương của một tổng.
Câu 3 (1,0đ)
a) Khai triển (2x + 3)2 b) Tính nhanh: 1172 + 172 – 34.117
Câu 4 (2,25đ) Phân tích các đa thức sau thành nhân tử:
a) 3x3 + 6x 2 +3x b) a2 – 6a – 4b2 + 9
Câu 5 (1,5đ) Tìm x, biết: (x – 5)2 – (3x – 7)2 = 0
Câu 6 (1,25đ) Làm tính chia:
a) 6x2y : 3xy b) (12x6y5 – 3x3y4 + 4x2y) : 6x2y
Câu 7(1,5đ)
a/ Tìm a để đa thức (x3 + 3x2 + 5x + a) chia hết cho đa thức (x + 3)
b/ Chứng minh rằng : 4x – x2 – 7 < 0 (Với mọi giá trị x )
Bài làm
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Trường THCS Ba Đồn BÀI KIỂM TRA ĐẠI SỐ -LỚP 8
Thời gian 45 phút
ĐỀ LẼ
Họ tên học sinh:.....................................................................Lớp 8......
Điểm
Lời phê của thầy, cô giáo
…………………………………………………………………………
…………………………………………………………………………
…………………………………………………………………………
Bằng số
Bằng chữ
Chữ ký:
Đề bài:
Câu 1: (1,5đ) Làm tính nhân .
a) 3x2 .(4x – 5x3) b) (x + 2).(x2 – 2x +4)
Câu 2 (1,0đ) Viết công thức tổng quát của hằng đẳng thức:
a) Bình phương của một hiệu. b) Lập phương của một hiệu
Câu 3 (1,0đ)
a) Khai triển (3x + 2)2 b) Tính nhanh: 1292 + 292 – 58.129
Câu 4 (2,25đ) Phân tích các đa thức sau thành nhân tử:
a/ 3x3 – 6x2 +3x b/ x2 + 6x – 4y2 + 9
Câu 5 (1,5đ) Tìm x, biết: (x – 1)2 – (2x – 3)2 = 0
Câu 6 (1,25đ) Làm tính chia:
a) 8xy2: 4xy b) (18x6y – 4x3y5 + 6x2y6) : 6x2y
Câu 7(1,5đ)
a/ Tìm a để đa thức (x3 + 4x2 + 6x + a) chia hết cho đa thức (x + 3)
b/ Chứng minh rằng : 6x – x2 – 11 < 0 ( Với mọi giá trị x )
Bài làm
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ĐÁP ÁN VÀ BIỂU ĐIỂM
Đề 1
Câu
Nội dung
Điểm
1
a) 2x2 .( 3x – 5x3) = 6x3 – 10x5
b) (x + 3).( x2 – 6x +9)
= x.( x2 – 6x +9) +3.( x2 – 6x + 9)
= x3 – 6x2 +9x +3x2 – 18 x + 27
= x3 – 3x2 – 9x + 27
0,
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