Question

Dada a P.A. (-33,-29,-25,-21,...) determine seu termo geral

Answer 1

r = a 2 - a 1

r = -29 - (-33)

r = -29 +  33

r = 4

a n = a 1 + (n - 1 ).r

a n = -33 + (n - 1 ) . 4

a n = - 33 + 4 n - 4

a n = -33 - 4 + 4 n

a n = - 37 + 4 n