Question

rezolvati exercitiul 1

Answer 1

1/7=0,(142857)

$x_{1}=1$
$x_{2}=4$
$x_{3}=2$
$x_{4}=8$
$x_{5}=5$
$x_{6}=7$


$x_{1}+x_{2}+x_{3}+...+x_{2017}=?$

(2017:6=336 rest 1)

$=(x_{1}+x_{2}+...+x_{6})+(x_{7}+x_{8}+...+x_{12})+...+(x_{2011}+x_{2012}+...x_{2016})+x_{2017}=$

=(1+4+2+8+5+7)+(1+4+2+8+5+7)+...+(1+4+2+8+5+7)+1=

=27+27+...+27+1=

=27×336+1=

=9.028+1=

=9.029