Question

comparati puterile: 3 43 9 21

Answer 1

$9^{21}=(3^2)^{21}=3^{2*21}=3^{42} ----->3^{43}>3^{42}----->3^{43}>9^{21}$

Answer 2

$9^{21}=( 3^{2} )^{21} =3^{2*21}= 3^{42} \\ \\ 3^{43} \ \textgreater \ 3^{42}$

deci $9^{21}\ \textless \ 3 ^{43}$