$\sqrt[4]{x-\sqrt{x^{2}-1}}+\sqrt{x+\sqrt{x^{2}+1}}=2$
da dung roi ko co sai anh –  phuocthang95 18-06-13 08:29 PM
bạn ơi có đúng một bên x^2-1, một bên x^2 1 không? –  Вő˚CĦĬĈŊ♂ 18-06-13 09:32 AM
Sao lại một cái căn bậc 4 , một cái căn bậc hai thế kia hả em –  GreenmjlkTea FeelingTea 17-06-13 09:05 PM

bị xóa vì bị trùng bởi Đức Vỹ 27-10-13 01:27 PM

Câu hỏi này có nội dung hoàn toàn trùng với câu hỏi đã có.

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