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

Toán Lớp 7: Tìm x: `x^2+99=2^(x+1) . (5x)^(2x)`

Toán Lớp 7: Tìm x:
x^2+99=2^(x+1) . (5x)^(2x)

Comments ( 1 )

  1. Xin hay nhất nhé tus ^_^
    Thay thử x=1 vào biểu thức, ta được:
    $1^{2}$ +99= $2^{1+1}$ . $(5.1)^{2.1}$
    1+99= $2^{2}$ . $5^{2}$ 
    100= $10^{2}$ 
    100=100
    ⇒ x=1 
    Vậy x=1

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

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