Đăng bài 10-05-12 09:25 AM
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Đăng bài 09-05-12 03:45 PM
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Đăng bài 09-05-12 03:40 PM
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Giải phương trình : $8 - x{.2^x} + {2^{3 - x}} - x = 0\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(1)$
Đăng bài 08-05-12 02:35 PM
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Giải phương trình : ${2^{x + 1}} - {4^x} = x - 1\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(1)$
Đăng bài 08-05-12 02:33 PM
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Mỗi phương trình sau đây có bao nhiêu nghiệm: $\begin{array}{l} 1)\,\,{\left( {\frac{1}{3}} \right)^x} = 2x + 1\,\,\,\,\,\,\,\,\,\,\,(1)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,3)\,{4^x} = x - 2\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(3)\\ 2)\,{3^x} = x + 5\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(2) \end{array}$
Đăng bài 08-05-12 02:12 PM
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Giải các phương trình : $\begin{array}{l} 1,{2^x} + x - 3 = 0\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(1)\\ 2){3^x} + {4^x} + {12^x} = {13^x}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(2) \end{array}$
Đăng bài 08-05-12 02:10 PM
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Giải các phương trình sau đây: $\begin{array}{l} 1)\,\,{3^x} + {4^x} = {5^x}\,\,\,\,\,\,\,\,(1)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,4)\,\,\,{3^x} + {4^x} + {5^x}\, = {10^x}\,\,\,\,\,\,\,\,\,\,\,\,(4)\\ 2)\,{2^x} + {3^x} = {5^x}\,\,\,\,\,\,\,\,(2)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,5)\,\,\,\lg \left( {x - 4} \right) = 5 - x\,\,\,\,\,\,\,\,\,\,\,\,\,\,(5)\\ 3)\,{5^x} + {12^x} = {13^x}\,\,\,\,(3) \end{array}$
Đăng bài 08-05-12 02:07 PM
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Đăng bài 07-05-12 03:22 PM
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Đăng bài 05-05-12 11:40 AM
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Đăng bài 05-05-12 10:11 AM
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Đăng bài 05-05-12 09:56 AM
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Đăng bài 04-05-12 04:04 PM
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Đăng bài 04-05-12 03:58 PM
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Đăng bài 04-05-12 03:37 PM
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