Question

1.determine o 80° termo da p.a (5,9,13,17.........an)
2..determine o 58° termo da p.a(-40,-37,-34,31.......an)

Answer 1

1°)an= a1+(n-1)r a80=5+(80-1).4 a80=5+79.4 a80=5+316 a80=321