Answer :

A.


4 can be written as 22.



=


We know that by properties of exponents,




B. 4n-1


We know that by properties of exponents,


4n-1 =


=


4n-1 =


C. 25 (5n-2)


25 can also be written as 52.


25 (5n-2) = 52 (5n-2)


We know that by properties of exponents, am × an = am + n.


52 (5n-2) = 52 + (n-2)


= 52 + n-2


= 5n


25 (5n-2) = 5n


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