Question

Va rog ....cat mai repede...Ex.14☺☺☺

Answer 1

$a= 3^{4000} (9-3-1)*5=3^{4000}*5^2=(3^{2000}*5)^2$
$b= (3^{164}:3^{100}:3^{32})^2:3^{60}=3^{64}:3^{60}=3^4=9^2$