Question

(4 to the power -1 + 8 to the power -1)÷(2/3)to the power -1

Answer 1

it can be written as
1/4+1/8÷3/2
3/8÷3/2
3/8×2/3
=1/4

Answer 2

= -4-8/-2/3
= -3×-12/-2
= 18 ans.