Question

Calcule o 100° termo da P.A (3,7,11...)

Answer 1

Olá, cara Icaro.

Dados:

$a_1= 3 \\ r= a_2-a_1 \\ r= 4 \\ a_1_0_0= ?$

Então:

$a_1_0_0= a_1+99*r \\ a_1_0_0= 3+396 \\ \boxed{\boxed{a_1_0_0= 399}}$

Obs.: Qualquer dúvida me consulte.

Answer 2

a100=a1+(100-1)r
a100= 3+99*4
a100=3+396
a100 =399