
#1
Jun3005, 02:43 AM

P: 31

I'm not sure how to solve these problems. The example given in the book does not use trig functions. Any insight into how I solve these would be helpful.
Find the following rates of convergence. [tex] \lim_{n\rightarrow infinity} sin(1/n) = 0 [/tex] My thought would be to do the following [tex] sin(1/n)  0 <= 1 [/tex] But the book says to get a rate in the form [tex]1/n^p[/tex] The following also gives me trouble. [tex] \lim_{n\rightarrow infinity} sin(1/n^2) = 0 [/tex] which seems like it should converge faster than the the first one. 



#2
Jun3005, 03:40 AM

P: 31

I made some progress by taking the maclaurin polynomial and only keeping the first couple terms. I can't get anything satisfactory for this one though
[tex]\lim_{n\rightarrow infinity} [ln(n+1)  ln(n)] = 0[/tex] I get to an answer of 2n or so, maybe I should keep more terms. Anybody help would be appreciated. 



#3
Jun3005, 07:21 AM

Math
Emeritus
Sci Advisor
Thanks
PF Gold
P: 38,898

Do you know that [tex]\lim_{x\rightarrow 0}\frac{sin(x)}{x} = 1[/tex]? If you let x= 1/n, that's the same as [tex]\lim_{n\rightarrow \infty}\frac{sin(1/n)}{1/n}= 1[/tex]. What does that tell you about the rate of convergence?
To do sin(1/n^{2}), look at [tex]\frac{sin(1/n^2}{1/n^2}[/tex] 



#4
Jan1212, 01:39 AM

P: 68

Rate of Convergence
im searching for tutorials on this section particularly....
any links? 


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