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

Toán Lớp 6: tìm x 5^x+3.5^4x-5^2x.5^3x+2=100 nhanh nah

Toán Lớp 6: tìm x
5^x+3.5^4x-5^2x.5^3x+2=100
nhanh nah

Comments ( 1 )

  1. Giải đáp + Lời giải và giải thích chi tiết:
    5^{x+3} * 5^{4x} – 5^{2x} * 5^{3x+2} = 100
    => 5^{x+3+4x} – 5^{2x+3x+2} = 100
    => 5^{5x+3} – 5^{5x+2} = 100
    => (5-1)*5^{5x+2} = 100
    => 4*5^{5x+2} = 100
    => 5^{5x+2} = 25
    => 5^{5x+2} = 5^2
    => 5x + 2 = 2
    => 5x = 0
    => x = 0
    Vậy x = 0

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

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