01- Calcule:
D) [1/4*(-2/3)-(5/6)]^2÷(3/2)^-1=
E) (-2/3)^2*(3/4)+1/4=
F) 3*10^-6*6*10
------------------------
9*10^-8
D) [1/4*(-2/3)-(5/6)]^2÷(3/2)^-1=
E) (-2/3)^2*(3/4)+1/4=
F) 3*10^-6*6*10
------------------------
9*10^-8
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Olá !
Vamos resolver as equações ....
[1/4 . (-2/3) - (5/6)]^2 : (3/2)^-1
[-2/12 - 5/6]^2 : 2/3^1
[-1/6 - 5/6]^2 : 2/3
[-6/6]^2 : 2/3
[ -1 ]^2 : 2/3
1 : 2/3
1/1 . 3/2 = 3/2
==============================================
(-2/3)^2 . 3/4 + 1/4
4/9 . 3/4 + 1/4
12/36 + 1/4
1/3 + 1/4
4/12 + 3/12 = 7/12
=======================================
[3.10^-6 . 6 . 10]/[9.10^-8]
[3.6.10^-6.10]/[9.10^-8]
[18.10^-5]/[9.10^-8]
18/9 . 10^-5/10^-8
2 . 10^(-5 - (-8))
2 . 10^(-5 + 8)
2 . 10^3
2. 1000 = 2 000 ok