Question

Va rog ex 1,2,3.....Repede dau coroniță

Answer 1

1/
$a) \\( {2}^{9} \times {3}^{8} + {2}^{8} \times {3}^{9} + {6}^{8} ) \div {6}^{9} =$
$= (2 \times {6}^{8} + 3 \times {6}^{8} + {6}^{8} ) \div {6}^{9}$
$= 6 \times {6}^{8} \div {6}^{9}$
$= {6}^{9} \div {6}^{9} = 1$
$b) \\ 2 \times {10}^{10} - 1 = 19999999999 = > 1 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 = 91$
la punctul cred ca este bine