Question

Scrie toate nr.de forma ab,stiindca a>bcu 2

Answer 1

$a = b + 2$

$pt. \: a = 2 = > b = 0$

$pt. \: a = 3 = > b = 1$

$pt. \: a = 4 = > b = 2$

$pt. \: a = 5 = > b = 3$

$pt. \: a = 6 = > b = 4$

$pt. \: a = 7 = > b = 5$

$pt. \: a = 8 = > b = 6$

$pt. \: a = 9 = > b = 7$

$\overline{ab}\:: \: 20,31,42,53,64,75,86,97.$