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

Toán Lớp 9: √x ³ – 1 / √x – 1 ( x >= 0; x khác 1 )

Tháng Sáu 8, 2022 Toán học 1 Comment 0 views

Toán Lớp 9: √x ³ – 1 / √x – 1 ( x >= 0; x khác 1 )

Comments ( 1 )

  1. baoquyen
    baoquyen
    8 Tháng Sáu, 2022 at 1:01 chiều
    Reply
    (\sqrt{x^3-1})/(\sqrt{x-1}) (x>=0,xne1)
    =(\sqrt{(x-1)(x^2+x+1)})/(\sqrt{x-1})
    =(\sqrt{x-1}.\sqrt{x^2+x+1})/(\sqrt{x-1})
    =\sqrt{x^2+x+1}
     

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

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