Question

na progressao aritimetica (1/2,1/8...) obter o decimo termo

Answer 1

Razão da P.A: $\frac{1}{8} - \frac{1}{2} = \frac{-3}{8}$

$a_{1} = \frac{1}{2}$, n  = 10, r = $\frac{-3}{8}$

Usando a fórmula do termo geral: $a_{n} = a_{1} + (n - 1)r$:

$a_{10} = \frac{1}{2} + (10 - 1)( \frac{-3}{8} ) = \frac{1}{2} + 9( \frac{-3}{8}) = \frac{1}{2} - \frac{27}{8} = \frac{-23}{8}$

Answer 2

1....10
1|10 . .liks