Question

Encontra p termo geral da P.A(4,7,...)

Answer 1

a_n = a_1+(n-1)*r

a_1 = 4

r = 7-4 = 3

Assim, o termo geral será:

a_n = 4 + (n-1)*3

a_n = 4+3n-3

a_n = 1+3n