Question

Resolva o valor de ...

B = (2/3)^-2 - (1/2)^-1 +(-1/4)^-2 =

Answer 1

B = (2/3)^-2 - (1/2)^-1 +(-1/4)^-2

(2/3)^-2=(3/2)^2=9/4

(1/2)^-1=2

(-1/4)^-2=(-4)^2=16

B = (2/3)^-2 - (1/2)^-1 +(-1/4)^-2
B = 9/4-2+16  m.m.c.=4
B = 9/4-8/4+64/4
B = 65/4
ou
B = 16,25

Answer 2

(2/3)^-2 = 3/2^2 = 9/4 = 2.25 
(1/2)^-1 = 2
(1/4)^-2 = 4^2 = 16 
2.25 - 2 + 16 = 0.25 + 16 = 16.25
B = 16.25