Question

determine a soma dos cem primeiros termos da pa (25,36,47,58...)

Answer 1

An= a1+(n-1).r
A100= 25+(100-1).11
A100= 25+ 99.11
A100= 25=1089= 1114

S100= (25+1114).100/2
S100= 1139.100/2
S100= 113900/2
S100= 56950

Espero ter ajudado