Question

calculeaza (7la puterea x )totul la puterea a 9 a= 7 la puterea 81 

Answer 1

( $7^{x}$ )⁹=7⁸¹
$7^{x*9}$=7⁸¹
$7^{x}$=7la putera 81 impartit la 9
$7^{x}$=7⁹⇒x=9

Answer 2

($7^{x}$)${9}$ = $7^{81}$
81=9·9 => x=9