KIỂM TRA 1 TIẾT
MÔN : ĐẠI SỐ
Điểm Lời phê của thầy
Câu 1 : Xác định tính đúng, sai của các mệnh đề sau : ( 2 điểm )
1) Số 3 là số chẵn.
2) Nếu a là số nguyên tố thì a có hai ước là 1 và chính nó.
3)
2
là số vô tỷ.
4) 34567 chia hết cho 9.
Câu 2 : Cho các mệnh đề P và Q. Phát biểu và xác định tính đúng, sai của mệnh đề P => Q.
( 2 điểm )
a) P : ABC là một tam giác cân.
Q : ABC là một tam giác đều.
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b) P : ABCD là một hình bình hành.
Q : ABCD là một hình thang.
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Câu 3 : Tìm tập xác định của các hàm số sau: ( 2 điểm )
a) y =
5
3
−
x
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Vì đồ thị đi qua B( 2 ; –5 ) nên :
4a + 2b + 3 = –5
Vì đồ thị đi qua C( –1 ; 4) nên :
a – b + 3 = 4
Ta có hệ phương trình :





=
−=
−=
⇒





=+−
−=++
=
3
2
1
4 3 b a
5 3 2b 4a
3 c
c
b