Question

Calcule o termo geral da p.a

a) ( -1,5,... )

Answer 1

an= a1+(n-1).r
an= - 1+(n-1). [5-(-1)]
an= -1+(n-1).(5+1)
an= -1+(n-1).6
an= -1+6n -6
an= -1-6+6n
an= -7+6n