Toán Lớp 6: c) 5 mũ x+2 – 2016 mũ 0 = 2 mũ 3.3
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Toán Lớp 6: c) 5 mũ x+2 – 2016 mũ 0 = 2 mũ 3.3
Comments ( 2 )
5^(x+2) – 2016^0 = 2^3*3
5^(x+2) – 1 = 24
5^(x+2) = 24 + 1
5^(x+2) = 25
25 = 5^2
x + 2 = 2
x = 2 – 2
x = 0
Vậy x = 0
c, 5^{x + 2} – 2016^0 = 2^3 * 3
5^{x + 2} – 1 = 8 * 3
5^{x + 2} – 1 = 24
5^{x + 2} = 25
5^{x + 2} = 5^2
x + 2 = 2
x = 0
Vậy x = 0