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revised Give upper and lower bound for $\left|\cos{na} + \frac{\sin{nb}}{n}\right|$
updated post to include more work
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asked Give upper and lower bound for $\left|\cos{na} + \frac{\sin{nb}}{n}\right|$
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asked How to show $a_n = \frac{n+1}{n-1}$ is strictly decreasing by induction?
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comment Clarification for proof of $\mathbb{Q}$ being dense in $\mathbb{R}$ (Rudin's PMA)
@ThomasAndrews And if it is the $nx$ obtained from $n(y-x)>1$, how does one know to focus on $nx$ and not $ny$?
Oct
14
comment Clarification for proof of $\mathbb{Q}$ being dense in $\mathbb{R}$ (Rudin's PMA)
@ThomasAndrews When you first mention $nx$, are you referring to the $nx$ obtained from $n(y-x)>1$?
Oct
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comment Baby Rudin Theorem 1.20 (b) Proof
@BrianM.Scott Why doesn't the set begin with "-m_2"?
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