Question

quantos são o múltiplos de 9 existente entre 20 e 250?​

Answer 1

Resposta:

26

Explicação passo-a-passo:

Answer 2

$\boxed{\begin{array}{l}\sf(27,36,... 243)\\\sf a_n=243~~a_1=27~~r=36-27=9~~n=? \\\sf a_n=a_1+(n-1)r\implies n=\dfrac{a_n-a_1}{r} +1\\\sf n=\dfrac{243-27}{9}+1\\\sf n=\dfrac{216}{9}+1\\\sf n=24+1\\\sf n=25\\\rm Existem~25~m\acute ultiplos~de~9~entre\\\rm 20~e~250\end{array}}$