Calcule a soma dos múltiplos de 12, compreendidos entre 50 e 200.... Pergunta de ideia delaviniaviana76

laviniaviana76 @laviniaviana76

October 2020 1 43 Report

Calcule a soma dos múltiplos de 12, compreendidos entre 50 e 200.

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AntoniLAD

Verified answer

A1=60
an=192
razão=12
n=?

an=a1+(n-1).r
192=60+(n-1).12
192=60+12n-12
192+12-60=12n
144=12n
n=144/12
n=12

sn=(a1+an).n/2
s12=(60+192).12/2
s12=252.12/2
s12=3024/2
s12=1512

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