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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 9: (x – √x / √x -1 – √x + 1/x) : √x +1 / x

Toán Lớp 9: (x – √x / √x -1 – √x + 1/x) : √x +1 / x

Comments ( 2 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết:
    $Bạn tham khảo ạ : ( x − √ x √ x − 1 − √ x + 1 x ) : √ x + 1 x = [ √ x ( √ x − 1 ) √ x − 1 − √ x + 1 x ] : √ x + 1 x = [ √ x − √ x + 1 x ] : √ x + 1 x = ( x √ x x − √ x + 1 x ) : √ x + 1 x = x √ x − √ x − 1 x . x √ x + 1 = x √ x − √ x − 1 √ x + 1 $

  2. Bạn tham khảo ạ :
    ((x – \sqrt{x} )/( \sqrt{x} -1) – (\sqrt{x} + 1)/x) : (\sqrt{x} +1) / x
    =[(\sqrt{x}(\sqrt{x}-1))/( \sqrt{x} -1) – (\sqrt{x} + 1)/x] : (\sqrt{x} +1) / x 
    =[\sqrt{x} – (\sqrt{x} + 1)/x] : (\sqrt{x} +1) / x 
    =((x\sqrt{x})/x – (\sqrt{x} + 1)/x) : (\sqrt{x} +1) / x 
    =(x\sqrt{x}-\sqrt{x} – 1)/x . x/(\sqrt{x} + 1)
    =(x\sqrt{x}-\sqrt{x} – 1)/(\sqrt{x} + 1)

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222-9+11+12:2*14+14 = ? ( )