Question

sa se afle formula termenului general :a).

1/2; 1/4; 1/8; 1/16...
b). -2/1; 3/2; -4/3; 5/4; -6/5

Answer 1

$a) \: { (\frac{1}{2})}^{n}$
$b) \: { (- 1)}^{n} \times \frac{n + 1}{n}$
nu se afla intr-un mod special, ci se observa si se deduce