Respostas

  • Usuário do Brainly
2014-06-07T14:32:30-03:00
8ˣ-8-ˣ =3+3.8-ˣ
8
ˣ=3+4.8-ˣ
4/8
ˣ-8ˣ=-3
4-8²ˣ/8ˣ=-3
-8²ˣ+4=-3.8ˣ
8²ˣ-3.8ˣ-4=0

y=8
ˣ

y²-3y-4=0
Δ=b²-4ac
Δ=(-3)²-4.1.(-4)
Δ=9+16
Δ=25

y'=3+5/2
y'=4

y''=3-5/2
y''=-2/2
y=-1

8
ˣ=4
3x.Log2=2.Log2
x=2/3




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