Question

please give this answer .

Answer 1

1)the equation will become 81^1/x^2==3
thus x=2.
2)the equation will become 2^2^3x=16
                                     then 2^6x=16
then x=1
3)the equation will become 3^2=x-1
                                    then x-1=9
then x=10

Answer 2

Logarithmic properties are always associated with indices.