Question

Obliczcie mi to plis:
1.2^-2:6^-1
2.(1/3-1/2)^-2
3.(1 1/3)^-2-(4/5)^-2
dam najj

Answer 1

1. 2^-2 : 6^-1= (1/2)^2:(1/6) = 1/4 :1/6 = 1/4 * 6 = 6/4 = 3/2 = 1 1/2
2. (1/3-1/2)^-2 = (2/6-3/6)^-2 = (-1/6)^-2 = (-6)^2 = 36
3. (1 1/3)^-2 - (4/5)^-2 = (4/3)-2 - (4/5)^-2 = (3/4)^2 - (5/4)^2 = 9/16-25/16 = -16/16 = -1