Resolva essa inequação exponencial
a) 3-4ˣ ≤ 72-6.4ˣ
b) 4ˣ⁺¹ . 2ˣ⁻¹ < 128
c) 25 ≥ 5/5ˣ
d) 3ˣ⁽ˣ⁺¹⁾ > 3ˣ²⁺¹
a) 3-4ˣ ≤ 72-6.4ˣ
b) 4ˣ⁺¹ . 2ˣ⁻¹ < 128
c) 25 ≥ 5/5ˣ
d) 3ˣ⁽ˣ⁺¹⁾ > 3ˣ²⁺¹
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3-4ˣ ≤ 72-6×4ˣ
-4ˣ +6×4ˣ ≤ 72-3
5×4ˣ ≤ 69
4ˣ ≤ 69/5
x ≤ 1/2x long2 69/5
b)4ˣ +1×2ˣ-1 <128
(2²)ˣ⁺¹×2ˣ⁻¹<2^7
2^3×+1 <7
3×<7-1
3×<6
x <2
c)25≥ 5÷5ˣ,xer
25 ≥5^-x+1
5-×+1≤25
5^-×1≤ 5^2
-x≤1
x≥ -1