# The #n#th term #u_n# of a geometric sequence is given by #u_n = 3(4)^(n+1)#, #n in ZZ^+#. What is the common ratio #r#?

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I supposed #r# might be #4# but the #n# th term of a geometric sequence is normally given by #u_n = u_1*r^(n-1)# , but in the question #4# has a power of #n+1# so I'm confused by #n+1# and #n-1#

I supposed

##### 1 Answer

Nov 25, 2017

#### Explanation:

The **Common Ratio** **Geometric Sequence**

Since,