Question

Rezultatul calculului (2^0-2^1-2^2):(-3)^-1 este egal cu....?

Answer 1

2^0= 1
2^1= 2
2^2= 4
-3^-1= -1\3
Deci (2^0-2^1-2^2):(-3)^-1= (1-2-4) : (-1\3)= -5 : (-1\3)= 5\3

Answer 2

$(2^0-2^1-2^2):(-3)^{-1}=(1-2-4):\dfrac{1}{-3}=-5\cdot\dfrac{-3}{1}=15$