Respostas

  • Usuário do Brainly
2013-10-12T15:29:26-03:00
11^2x = 11^2
2x = 2
x = 2/2
x = 1


2^(x^2 - 4x) = 2^4
x^2 - 4x = 4
x^2 - 4x - 4 = 0
delta =  b^{2} - 4.a.c
delta =  (-4)^{2} - 4.1.(-4)
delta = 16 + 16
delta = 32

x= - b +-  \sqrt{delta} / 2.a
x= -(-4) +-  \sqrt{32} / 2.a
x = 4 +- 4 \sqrt{2} / 2
x* = x**

x* = 4 - 4 \sqrt{2} / 2
x* = 2 - 2 \sqrt{2}

x** = 4 + 4 \sqrt{2} / 2
x** = 2 + 2 \sqrt{2}

S = { 2 - 2 \sqrt{2} e 2 + 2 \sqrt{2} }









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