Question

calcule o termo da P.A(3,7,11...) ajudaaaaaaaaaaaaaa

Answer 1

a1 = 3
r = 4

an = a1+(n-1)r
an= 3+(n-1).4
an= 3+4n-4
an = 3-4+4n
an = -1+4n

Answer 2

termo da pa = an = a1+(n-1).r
an = 3 + (n-1).4
an = 3 + 4n - 4
an = -1 + 4n