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

Toán Lớp 6: a/ 5 mũ n + 1 = 625 b/ 2 mũ 3 . 2 mũ x = 64 c/ 2 mũ x : 16 = 128 d/ x mũ 2015 = 1 Help

Toán Lớp 6: a/ 5 mũ n + 1 = 625
b/ 2 mũ 3 . 2 mũ x = 64
c/ 2 mũ x : 16 = 128
d/ x mũ 2015 = 1
Help

Comments ( 2 )

  1. a,
    5^(n + 1) = 625
    => 5^(n + 1) = 5^4
    => n + 1 = 4
    => n = 4 – 1
    => n = 3
    Vậy n = 3
    b,
    2^3 . 2^x = 64
    => 2^(3 + x) = 64
    => 2^(3 + x) = 2^6
    => 3 + x = 6
    => x = 6 – 3
    => x = 3
    Vậy x = 3
    c,
    2^x : 16 = 128
    => 2^x = 128 . 16
    => 2^x = 2048
    => 2^x = 2^11
    => x = 11
    Vậy x = 11
    d,
    x^2015 = 1
    => x^2015 = 1^2015
    => x = 1
    Vậy x = 1

  2. Đây bạn.
    $\text{@ThanhTruc2008}$

    toan-lop-6-a-5-mu-n-1-625-b-2-mu-3-2-mu-64-c-2-mu-16-128-d-mu-2015-1-help

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

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