Question

Qual o decimo termo da p.a (1,3,5,...)

Answer 1

$\boxed{a_n=a_1+(n-1)*r}\\\\ a_1_0=?\\ a_1=1\\ r=2\\ n=10\\\\ a_1_0=1+(10-1)*2\\\\ a_1_0=1+9*2\\\\ a_1_0=1+18\\\\ \boxed{a_1_0=19}$