+0  
 
0
49
1
avatar

If b is positive, what is the value of b in the geometric sequence 16, a, 18, b?

 Nov 5, 2021
 #1
avatar+11 
0

someone(geno3141) has already answered this q here, u will find it if u search for the q in the google search bar.

 

I've copied and pasted geno3141 's answer here for now: 

 

Geometric sequences have a common ratio, r    (it's a multiplier)

 

We have:  16,  16r,  16r2 = 8,  16r3 

 

Since  16r2 = 8,  r2  =  ½   and  r  =  sqrt(2)/2

 

b  =  8· sqrt(2)/2  =  4·sqrt(2)

 Nov 5, 2021

13 Online Users