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

Toán Lớp 6: Tìm x: 3^(x + 5)(-3:x + 1) = 1

Toán Lớp 6: Tìm x:
3^(x + 5)(-3:x + 1) = 1

Comments ( 1 )

  1. 1=-1.1=1.(-1)
     *3^(x+5)=1
    3^(x+5)=3^0
    ⇒x+5=0
    x=-5
    *-3/x+1=1
    -3/x=0
    x=0
    ⇒(x,y)∈ {(-5; 0)}

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

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