8 chia hết cho x
=>x thuộc Ư(8) và x>0
=> x=1;2;4;8
Đáp án:
Giải thích các bước giải:
8 chia hết cho x và x lớn hơn 0
⇒ x∈ Ư(8)
⇒x = ( 1; 2; 4; 8)
Chúc bạn học tốt!
Bài1:Cho tam giác ABC,kẻ AH vuông góc với BC. Biết AB=5cm,BH=3cm,BC=8cm.Tính độ dài các cạnh AH,HC,AC? Bài2:Cho tam giác cân ABC cân tại A(AB=AC).Gọi D,E lần lượt là trung điểm của AB và AC. a.CM:tam giác ABE=tam giác ACD b.CM:BE=CD c.Gọi K là giao điểm của BE và CD.CM tam giác KBC cân tại K d.CM:AK là tia phân giác của BAC Bài3:Cho tam giác ABC có AB=AC=5cm,BC=8cm.Kẻ AH vuông góc với BC(H€BC) a.CM:HB=HC và BAH=CAH b.Tính độ dài AH c.Kẻ HD vuông góc với AB(D€AB).CMR:tam giác HDE cân
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