ĐỀ KT 1 TIẾT ĐẠI SỐ 9 CHƯƠNG III

Trường: THCS Phổ An ĐỀ KIỂM TRA CHƯƠNG III
Họ và tên:......................... Môn: Đại Số 9
Lớp:.................................. THỜI GIAN: 45’

ĐIỂM:
Lời phê của GVBM:...................................................................................................

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ĐỀ BÀI:
Bài 1: ( 2 điểm) Cho hệ phương trình


Tìm k để hệ có nghiệm (x;y) = (2; 1).
Tìm k để hệ có một nghiệm duy nhất.

Bài 2: ( 4 điểm) Giải hệ phương trình sau:
a.
b.
c.

Bài 3: ( 3 điểm) Một ô tô dự định đi từ A đến B với thời gian nhất định. Nếu tăng vận tốc 10 km/h sẽ đến nơi sớm hơn 3h. Nếu giảm vận tốc 10 km/h sẽ đến trễ 5h. Tính quãng đường AB.

Bài 4: ( 1 điểm) Tìm a và b biết đố thị hàm số y = ax + b đi qua các điểm (
và ( 2 ;
)
Bài làm:
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