calcule potência
r) (2/3)-² =
s) (-2/3) =
t) (-3/4)=
u) (1/5)-¹=
v) (1/3)-³=
w) (-0,75)-²=
Soluções para a tarefa
Resposta:
a)
(3/4)².(-2)³+(-1/2)¹
9 . (-8) - 1
---- ----
16 2
- 72 (:8) - 1 - 9 - 1 - 10
------- ----- = ------ ----- = ------- = - 5
16 (:8) 2 2 2 2
**************************************************************
b)
(1/2)-²+(1/3)-¹
= (2)² + (3)¹
= 4 + 3
= 7
*************************************
c)
-2.(3/2)³+1¹-(-2)¹
- 2 . 27 + 1 - (- 2)
-----
8
- 54 + 1 + 2
-------
8
- 54 (:2) + 3 = - 27 + 3 - 27 + 12 - 15
------- ------ = ------------ = --------
8 (:2) 4 4 4
***************************************************************
d)
{(-5/3)-¹ + (5/2)-¹}-¹
- 1
{ - 3 + 2 }
----- -----
5 5
- 1 1
[- 1 ] = - 5 = - 5
------
[ 5]
*****************************************
e)
{3-¹ - (-3)-¹}-¹
- 1
{ 1 - ( - 1 ) }
---- -----
{ 3 ( 3 )}
- 1 - 1
1 + 1 = 2 = 3
--- ---- ----- -----
3 3 3 2
*********************************************
f)6.(2/3)-² + 4.(-3/2)-²
6 . (3)² + 4 . ( - 2)²
------ -----
( 2)² ( 3)²
6. 9 - 4. 4
----- -----
4 9
54 - 16 27 - 16 9.27 - 2.16 243 - 32
----- ---- = ------ ----- = ------------------ = ----------------
4 9 2 9 18 18
= 211
-------
18
Explicação passo-a-passo:
Esperp ter ajudado