Question

Calcule
(2/3)^-1
-(2/5)^-2
-(-2/3)^-3
1/2^-3
1/(0,2)^-2
1 (-3)^-3
1/(0,01)^-2

Answer 1

( 2/3)⁻¹ = ( 3/2)¹***
b
- (2/5)⁻² = - ( 5/2)²  = - 25/4 ***
c
- ( - 2/3)⁻³ =  - ( -3/2)³  = - ( - 27/8) = 27/8 ***
d
1/2⁻³ =  2³ = 8 ***
e
1/ (0.2)⁻²  =  [ ( 0.2) /1)] ²   = ( 0.04/1)= 0.04 ou 4/100 ***
f
1/ ( - 3)⁻³  = ( -3/1)³  = - 27 ***
g
 1/ ( 0,01)⁻² =  ( 0.01/1)² = 0,0001 ou   1/10.000 ***