Question

Como se resolve: 3^-1 + 2^-2 - (-4)^-1

Answer 1

3-¹ + 2-² - (-4)-¹ =
 (1/3)¹ + (1/2)² - (-1/4)¹ =
 1/3 + 1/4 + 1/4 =
 1/3 + 2/4 =
 1/3 + 1/2 =   mmc(2,3) = 6
 2/6 + 3/6 = 5/6