Question

1)Determine o vigésimo sétimo termo da P.A. de sequência ( 6 , 9 ,12..........)​

Answer 1

$\mathsf{ a_n=a_1+(n-1)r}$

$\mathsf{a_{27}=6+(27-1)(3) }$

$\mathsf{a_{27}=6+(26)(3)}$

$\mathsf{ a_{27}=6+ 78}$

$\boxed{\boxed{\mathsf{ a_{27}= 84}}}$