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

Toán Lớp 7: (x/5-1/3)^7=-1/15^7 15^7 nha chu ko phai (1/15)^7

Toán Lớp 7: (x/5-1/3)^7=-1/15^7
15^7 nha chu ko phai (1/15)^7

Comments ( 2 )

  1. (x/5 – 1/3)^7 = (-1)/(15^7)
    (x/5 – 1/3)^7 = (-1/15)^7
    x/5 – 1/3 = -1/15
    x/5 = -1/15 + 1/3
    x/5 = 4/15
    (3x)/15 = 4/15
    3x = 4
    x = 4 : 3
    x = 4/3
     

  2. Giải đáp + Lời giải và giải thích chi tiết !
    (x/5-1/3)^7 = (-1)/(15^7)
    <=> (x/5-1/3)^7 = ((-1)^7)/(15^7)
    <=> (x/5-1/3)^7 = ((-1)/(15))^7
    <=> x/5-1/3 = -(1)/(15)
    <=> x/5 = -(1)/(15)+1/3
    <=> x/5 = 4/(15)
    <=> x. 15 = 4. 5
    <=> x. 15 = 20
    <=> x = (20)/(15)
    <=> x = 4/3
    Vậy x=4/3
     

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

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