Question 1029216
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the first term of a geometric progression is 5 and the fifth term is 1280 and the common ratio is 4. 

 Find out the expression of the nth term.? 
 
IS THE ANSWER OF THE NTH TERM 4N+1?
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The expression of the nth term of ANY geometric progression is

   {{{a[n]}}} = {{{a[1]*r^(n-1)}}},

where {{{a[1]}}} is its first term and {{{r}}} is its common ratio.

In your case {{{a[1]}}} = 5  and  {{{r}}} = 4.

So, the expression of the nth term of YOURS geometric progression is

   {{{a[n]}}} = {{{5*4^(n-1)}}}.


IS THE ANSWER OF THE NTH TERM 4N+1? - NO.
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