Question

Para k=5 qual valor de x

Answer 1

$x = \frac{3. {(5)}^{2} }{2} - \frac{(5)^{3} }{6} + 3 \frac{7.(5)}{3} \\ x = \frac{3 \times 25}{2} - \frac{125}{6} + 3 - \frac{35}{3} \\ x = \frac{75}{2} - \frac{125}{6} + 3 - \frac{35}{3} \\ x = \frac{450 - 250 + 36 - 140}{12} \\ x = \frac{96}{12} \\ x = 8 \\ logo \: a \: alternativa \: correta \: letra \: (c)$