Question

considerando a p.a (-24,27,...) calcule a33

Answer 1

$a_{n} = a_{33} =?;n=33; a_{1} =-24;r=51 \\ a_{n} = a_{1} +(n-1)*r \\ a_{33} =-24+(33-1)*51 \\ a_{33} =-24+32*51 \\ a_{33} =-24+1632 \\ <strong>a_{33} =1608$