Question

Décimo termo de uma P.A(3,7,11...)é:
a)36
b)33
C)39
D)30

Answer 1

$\boxed{\boxed{Ola\´\ Suely}}$

$P.A(3,7,11...)\\ \\ \\ Fo \´\ rmula=> an=a1+(n-1).r$

$an=?\\ n=10\\ a1=3\\ r=4\\ \\ \\ an=3+(10-1)*4\\ an=3+9*4\\ an=3+36\\ an=39\\ \\ \\ \boxed{{GABARITO=> C}}\\ \\ \\ Espero\ ter\ ajudado.$