nth term for the geometric sequence 4,8,16,... is 
Step-by-step explanation:
We need to write an equation for the nth term of the geometric sequence: 4, 8, 16 . . .
The formula to find the nth term of geometric sequence is

Where a_n is nth term
a_1 is 1st term
and r is common ratio
Finding a_1 and r in the sequence 4,8,16,...

So, common ratio r is: 2 and a_1 is 4
The nth term is:

So, nth term for the geometric sequence 4,8,16,... is 
Keywords: Geometric sequence
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