Question

Suma s=½+2-¹+2+(-2)¹+(-2)² este egală cu ....

Answer 1

$S = \frac{1}{2} + {2}^{ - 1} + 2 + {( - 2)}^{1} + {( - 2)}^{2}$

$S = \frac{1}{2} + \frac{1}{2} + 2 - 2 + 4$

$S = \frac{1 + 1}{2} + 0 + 4$

$S = \frac{2}{2} + 4$

$S = 1 + 4$

$S = 5$

Answer 2

S = \frac{1}{2} + {2}^{ - 1} + 2 + {( - 2)}^{1} + {( - 2)}^{2}   S = \frac{1}{2} + \frac{1}{2} + 2 - 2 + 4  S = \frac{1 + 1}{2} + 0 + 4  S = \frac{2}{2} + 4  S = 1 + 4  S = 5