Question

Me ajudem aaaaaaaAaaaaaaaaaaaaaaaaaa

Answer 1

$\huge{{{ab + 1 \over b} \over {ab + 1 \over a}}} \\\\ \huge{= {ab +1 \over b} \times {a \over ab + 1} } \\\\\\ \boxed{\huge{= { a \over b }}}$

Resposta: letra a)