Giáo án Kiểm tra chương I môn : đại số 9 (thời gian 45 phút)

Trường T H C S Trường Yên Lớp 9.. Họ và tên: Kiểm tra chương I Môn : Đại Số (thời gian 45p) Điểm Lời phê của thày giáo Bài 1. (1,5đ). Tìm x để mỗi căn thức sau có nghĩa. a. . b. . c.. Bài 2(3đ).Tính a) b) c) d) Bài 3(1,5đ).tìm x,biết. a) b) 5 Bài 4(3đ).Cho biểu thức a)Với giá trị nào của a thì P xác định,rút gọn P b)Tính giá trị của P khi a = 4. c)Với giá trị nào của a thì P < 0. Bài 5 (1đ).Tìm giá trị lớn nhất của biểu thức : -x + . Bài giải 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