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

Toán Lớp 9: 1/x+1+ √x ≤ 0 giúp vssssssssssssssssssssssssssssssssssssssssssssssssssssss

Toán Lớp 9: 1/x+1+ √x ≤ 0
giúp vssssssssssssssssssssssssssssssssssssssssssssssssssssss

Comments ( 1 )

  1. 1/x+1+ √x ≤ 0
    mà √x≥0
    ⇒x≥0
    ⇒1/(x+1)>0
    ⇒1/(x+1)+√x>0
    ⇒vô nghiệm
    đề 2
    1/(x+√x+1)≤0
    ta có :
    1>0
    ⇒có nghiệm khi :
    x+√x+1≤0
    ⇔4x+4√x+4≤0
    ⇔(2√x+1)^2+3≤0
    ⇒vô nghiệm

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