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Giải vở bài tập Toán 7 chương I bài 11: Số vô tỉ. Khái niệm về căn bậc hai

Thứ sáu - 25/10/2019 03:37
Hướng dẫn Giải vở bài tập Toán 7 chương I bài 11: Số vô tỉ. Khái niệm về căn bậc hai
Bài 1.
a) Vì 62 = 36 nên  = 6
b) Vì 82 =64 nên  = 8
c) Vì 52 = 25 nên  = 5
d) Vì =   nên  =

Bài 2:
a)
d)  = 9
b) - = -5
c)  =
d)  = 5
e)  =  = 5

Bài 3.
Nếu  = 2 thì x = 4. Do đó x2 = 16
Vậy câu trả lời đúng là D.

Bài 4.
giai vbt toan 7 bai 11 cau 4
Bài 5.
giai vbt toan 7 bai 11 cau 4
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