Question

pls answer to these questions also​

Answer 1

4) [(1/3)^-1 - (1/4)^-1]^-1

= [3-4]^-1

= [-1]^-1

=(-1)

5) (2^5/2^8)^5 x 2^-5

= (2^-3)^5 x 2^-5

= 2^-15 x 2^-5

= 2^-20

= 1048576^-1

6) (-3)^4 x (5/3)^4

= 81 x 625/81

=625

7) [(1/3)^-2 - (1/2)^-3] / [1/4]^-2

= [(3^2)- (2^3)] / (4^2)

=[9-8]/16

=1/16

=16^-1