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

Toán Lớp 7: 2^10*27^3*25^4/6^9*125^8. Làm hộ em nha.

Toán Lớp 7: 2^10*27^3*25^4/6^9*125^8. Làm hộ em nha.

Comments ( 2 )

  1. Giải đáp:
    {2^10. 27^3 .25^4}/{6^9 . 125^8} 
    = {2^10 . (3^3)^3 . (5^2)^4}/{2^9 . 3^9 . (5^3)^8}
    = {2^10 . 3^9 . 5^8}/{2^9 . 3^9 . 5^24}
    = {2 . 2^9 . 3^9 . 5^8}/{2^9 . 3^9 . 5^8 . 5^16}
    = {2 . \cancel{2^9} . \cancel{3^9} . \cancel{5^8}}/{\cancel{2^9} . \cancel{3^9} . \cancel{5^8} . 5^16}
    = 2/{5^16}
    ∘ dariana

  2. Lời giải chi tiết:
    (2^(10).27^(3).25^4)/(6^(9).125^8)
    =(2^(10).(3^3)^(3).(5^2)^4)/((2.3)^(9).(5^3)^8)
    =(2^(10).3^(9).5^8)/(2^(9).3^(9).5^24)
    =2^10/(2^9).(3^9)/(3^9).(5^8)/(5^24)
    =2.(1)/5^16
    =2/5^16

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