Question

determinati numerele naturale x astfel incat
2la puterea x=8
xa peterea7=0
2la puterea x=8
7la puterea x totul la puterea 9=7la puterea 81

Answer 1

${2}^{3} = 8 \\ {0}^{7} = 0$
$({ {7}^{x} })^{9} = {7}^{81} \\ {7}^{9x} = {7}^{81} \\ {7}^{9 \times 9} = {7}^{81}$