Question

determinar o 40 termo da pa (2,13,24,35,...)

Answer 1

a1=2
r=11
n=10

an= a1+(n-1)r
a40= 2+(40-1)11
a40= 2+429
a40= 431

Answer 2

A1=2

r=13-2=11

A40=A1+(40-1)•11

A40=2+39•11

A40=2+429

A40=431