Question

calcule a soma dos 130 termos da pa (8, 13...653)​

Answer 1

$\large\boxed{\boxed{\boxed{{Ol\'a\:Keteny}}}}}$

A soma dos termos da p.a é dada por:

$\large\boxed{\boxed{{S_{n}=\frac{a_{1}+a_{n}}{2}.n}}}}}$

Onde:

$\left\{\begin{array}{cc}a_{1}=8\\a_{n}=653\\n=130\\\end{array}\right$

Log:

$S_{130}=\frac{8+653}{2}.130$

$S_{130}=\frac{661.130}{2}$

$S_{130}=\frac{85930}{2}$

$\large\boxed{\boxed{{S_{130}=42965}}}}}$