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

Toán Lớp 6: 5.3^11+4.3^12 phần 3^9.5^2-3^9.2^3

Toán Lớp 6: 5.3^11+4.3^12 phần 3^9.5^2-3^9.2^3

Comments ( 2 )

  1. (5.3^11+4.3^12)/(3^9 .5^2-3^9 .2^3)
    =(3^11 . (5+4.3))/(3^9 . (5^2-2^3))
    =(3^11 . (5+12))/(3^9 . (25-8))
    =(3^11 . 17)/(3^9 . 17)
    =3^11/3^9
    =3^2
    =9
     

  2. (5. 3^11 + 4. 3^12)/(3^9. 5^2 – 3^9. 2^3)
    = (3^11. (5+4.3))/(3^9. (5^2 – 2^3))
    = (3^11. (5+12))/(3^9. (25-8))
    = (3^11. 17)/(3^9. 17)
    = (3^11)/(3^9)
    = 3^(11-9)
    = 3^2
    = 9
    #Mon
     

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

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