" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
A1=74
An=140
Razón (r)=76-74=78-80=2
Cálculo del número de términos (n):
An=A1+(r-1)*n
140=74+(2-1)*n
66=1*n
n=66
Cálculo de la suma (S):
S=(A1+An)*n/2
S=(74+140)*66/2
S=214*33
S=7062