00:01
Hi, let's start the solution.
00:02
In this question we have given fn5 equal to minus 1 power n into n factorial upon 4 power n into n plus.
00:18
So, we know that taylor series centered at a is f of x equal to summation n is 0 to infinity fna upon n factorial x minus a power n.
00:36
So, we are given that fn5 equal to minus 1 power n into n factorial upon 4 power n into n plus 3.
00:46
So, the series is centered at a equal to 5.
00:52
So, f of x equal to summation n is 0 to infinity fn5 is minus 1 power n into n factorial upon 4 power n into n plus 3 divided by n factorial into x minus 5 power n.
01:12
So, here n factorial n factorial are cancelled out then we get f of x equal to summation n is 0 to infinity minus 1 power n upon 4 power n into n plus 3 x minus 5 power n.
01:34
Next, we find the radius of convergence of the taylor series.
01:41
So, we use the ratio test to find the radius of convergence.
01:51
So, we can leave off the minus 1 power n part since the absolute value will just turn it into 1.
02:01
So, a n is consider a n is x minus 5 power n upon 4 power n into n plus 3.
02:13
So, a n plus 1 is x power x minus 5 power n plus 1 upon 4 power n plus 1 into n plus 1 plus 3 is n plus 4...