Question

determine o valor das expressões : 2 elevado a -1 +6*(2/3)elevado a -2 - (-1/3)elevado a -1

Answer 1

2-¹ + 6. (2/3)-² - (-1/3)-¹ =
1/2 + (12/3 ) -²  - (-3/1) =
1/2  + ( 3/12)²  + 3/1=
1/2 + 9/144 + 3/1 =
72  + 9   + 432 = 
81 + 432 = 
513