Đăng bài 30-05-12 08:36 AM
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Giải các phương trình : $\begin{array}{l} 1)\,\,{2^{x + 2}}{.5^{x + 2}} = {2^{3x}}{.5^{3x}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,3)\,\,{3^{2x + 3}}{.5^{2x + 3}} = {3^{5x}}{.5^{5x}}\\ 2)\,\,{3^{x + 3}}{.7^{x + 3}} = {3^{2x}}{.7^{2x}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, 4)\,{2^{x + 4}}{.7^{x + 4}} = {2^{3x}}{.7^{3x}} \end{array}$
Đăng bài 24-04-12 11:58 AM
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Đăng bài 24-04-12 02:19 PM
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Đăng bài 24-04-12 01:47 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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Đăng bài 24-04-12 02:33 PM
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Đăng bài 24-04-12 02:17 PM
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Đăng bài 01-06-12 10:24 AM
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Đăng bài 24-04-12 02:54 PM
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Đăng bài 27-04-12 08:28 AM
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Đăng bài 25-04-12 10:54 AM
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Đăng bài 24-04-12 01:52 PM
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Giải phương trình : ${2^{x + 1}} - {4^x} = x - 1\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(1)$
Đăng bài 26-04-12 03:20 PM
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Giải phương trình : ${\left( {2 + \sqrt 3 } \right)^{{x^2} - x + 1}} + {\left( {2 - \sqrt 3 } \right)^{{x^2} - x - 1}} = \frac{2}{{\left( {2 - \sqrt 3 } \right)}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(1)$
Đăng bài 24-04-12 03:00 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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