a) 2n = 16
2n = 24
=> n = 4
b) 4n = 64
4n = 43
=> n = 3
c) 15n = 225
15n = 152
=> n = 2
\(2^n\)\(\Rightarrow\)n= 4
\(4^n\)\(\Rightarrow\)n=3
\(15^n\)\(\Rightarrow\)n=2
a/2n = 16 ; b/4n = 64 ; c/ 15n = 225
2n = 24 ; 4n = 43 ; 15n = 152
=> n = 4 ; => n = 3 ; => n = 2