Question

rezolva inecuatia 
8 la puterea x+5 : 4 la puterea 3mai mic sau egal fata de 16 la puterea 9
25 la piterea 2x+1 ori 125la puterea 5 mai mare sau egal fata de5 la puterea 37

Answer 1

$8^{x+5} :4^3 \leq 16^9 \\ \\ (2^3)^{x+5}:(2^2)^3 \leq (2^4)^9 \\ \\ (2^3)^{x+5}:2^6 \leq 2^{36} \\ \\ 3*(x+5)-6=36=>3x+15=42=>3x=27=>\boxed{x=9} \\ \\ =>x=[0,1,2,3,4,5,6,7,8,9]$