Question

Função exponencial 4x-6×2x+8=0

Answer 1

Boa tarde Elih 

4^x - 6*2^x + 8 = 0

(2^x)^2 - 6*2^x + 8 = 0

y = 2^x

y² - 6y + 8 = 0

delta
d² = 36 - 32 = 4
d = 2

y1 = (6 + 2)/2 = 4 ⇒ 2^x1 = 4 ⇒ x1 = 2
y2 = (6 - 2)/2 = 2 ⇒ 2^x2 = 2 ⇒ x2 = 1

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