Answer:
solution 
given that
ar=8 __________equation 1
r=4
putting r=4in equation 1 we get
a×4=8
a=2
now 
t4=ar^(4-1)
 = 2×4^3
 =2×4×4×4
 =128ans
 
        
             
        
        
        
Answer:
answer is in picture
Step-by-step explanation:
 
        
             
        
        
        
Answer:
23 + 0
Step-by-step explanation:
calculator 
 
        
             
        
        
        
5 would be the answer to it