sea : [tex] a_{1} = 17
[/tex] , [tex]r = 11/2
[/tex] ( r : razon)
y [tex]n = 79
[/tex] ( numero de terminos9
Usas la formula del termino n-esimo: [tex] a_{n} = a_{1} +( n - 1) r[/tex]
[tex] a_{79} = 17 + (78) \frac{11}{2} [/tex]
[tex] a_{79}= 17 + 429 = 446.
[/tex]
Suma de terminos : [tex] S_{n} = ( a_{1} + a_{n} ) \frac{n}{2} [/tex]
[tex] S_{79} =463 * \frac{79}{2} [/tex]
[tex] S_{n} = 18288[/tex]
