Question

Alguém me ajuda nessas questões pfvr

Answer 1

a)

2ˣ < 2⁶

x < 6

b)

$16^{-x} \leq 64\\ 4^{-2x} \leq 4^{3}$

-2x ≤ 3 * (-1)

x ≥ -3/2

c)

$(\frac{25}{100})^{x + 5} > \frac{5}{10} \\ \\ (\frac{5}{10})^{2(x + 5)} > \frac{5}{10}$

2x +10 > 1

x > -9/2

d)

$5^{x(3x + 2)} \leq 125^{x^{2} + 4} \\ \\ 5^{(3x^{2} + 2x)} \leq 5^{3(x^{2} + 4)} \\ \\ 3x^{2} +2x \leq 3x^{2} +12\\ 2x \leq 12 \\ x \leq 6$