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thanghekhoc


1, [tex] log_3( \sqrt{x} + 2) = log_7(x) [/tex]
2, [tex] 2log_6(\sqrt[4]{x} + \sqrt[8]{x} ) = log_4(\sqrt{x} [/tex]
3, [tex] log_3(x^2 + x + 1) - log_3(x) = 2x - X^2 [/tex]
2, [tex] 2log_6(\sqrt[4]{x} + \sqrt[8]{x} ) = log_4(\sqrt{x} [/tex]
3, [tex] log_3(x^2 + x + 1) - log_3(x) = 2x - X^2 [/tex]