Answer:
4 = 256
Step-by-step explanation:
From the given data ;
when x =1 , then

for x= 2 ,

for x =3 ,
We can see from the above that the answers were always four times the previous answer or
4
4.4 =16
4.4.4 =64
4.4.4.4 =256
⇒ for x =4 we have tex]4^4= 256[/tex]