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13:49 24/05/2021
x(3+x)=x^3+8x-3x+20
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08:25 17/05/2021
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Trả lời (1)
07:42 16/05/2021
3x-x/2=8x
Trả lời (1)
15:30 15/05/2021
|x-3|=3x+9
Trả lời (2)
15:20 15/05/2021
|x-3|=3x-9
Trả lời (1)
15:19 15/05/2021
cho 300 ml dung dịch KOH 1,5 M tác dụng với 100 ml dung dịch H2SO4 2M . Tính nồng độ các chất trong dung dịch sau phản ứng theo sơ đồ
KOH + H2SO4--->K2SO4 +H2O
Trả lời (2)
15:39 15/04/2021
Thuyết minh về danh lam thắng cảnh đền Tiên La ở Thái Bình
Trả lời (1)
19:11 13/03/2021
