câu hỏi rất hay

pham hongthai tra loi rat hay va dung

\(1=3^0;243=3^5;\dfrac{1}{3}=3^{-1};\dfrac{1}{9}=3^{-2}\)

cac ban dang dung

\(\left(\sqrt{\dfrac{1}{3}}-\sqrt{\dfrac{4}{3}}+\sqrt{3}\right):\sqrt{3}\)

\(=\left(\sqrt{\dfrac{1}{3}}:\sqrt{3}\right)-\left(\sqrt{\dfrac{4}{3}}:\sqrt{3}\right)+\left(\sqrt{3}:\sqrt{3}\right)\)

\(=\dfrac{1}{3}-\dfrac{2}{3}+1=\dfrac{2}{3}\)

cac ban ghi loi giai va phep tinh giup minh nhe

\(C_2H_6O+O_2\rightarrow CO_2+H_2O\)

PTHH: \(C_2H_6O+3O_2\rightarrow2CO_2+3H_2O\)

OH! Phần c mình làm sai r nhé :V

bắp ngô

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