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

Toán Lớp 6: Tìm x : `2^(x-5) . ( 2^2)^4 = 8^7`

Tháng Hai 7, 2023 Toán học 2 Comments 0 views

Toán Lớp 6: Tìm x :
2^(x-5) . ( 2^2)^4 = 8^7

Comments ( 2 )

  1. maitrucloan
    maitrucloan
    7 Tháng Hai, 2023 at 2:23 sáng
    Reply
    2^(x – 5) . (2^2)^4 = 8^7
    => 2^(x – 5) . 2^8 = (2^3)^7
    => 2^(x – 5) . 2^8 = 2^21
    => 2^(x – 5) = 2^21 : 2^8
    => 2^(x – 5) = 2^13
    => x – 5 = 13
    => x = 13 + 5
    => x = 18
    Vậy x = 18

  2. doanthulan
    doanthulan
    7 Tháng Hai, 2023 at 2:23 sáng
    Reply
    2^(x-5) . (2^2)^4 = 8^7
    2^(x-5) . 2^8 = (2^3)^7
    2^(x-5 + 8) = 2^21
    x – 5 + 8 = 21
    x + 3 = 21
    x = 18
    Vậy x = 18

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

Kim Duyên

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