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Posts by r~~‭

48 posts
Score Age
66%
+2 −0
Q&A Finding the limit $ \lim_{x\to 0^+}e^{1/x}\sum_{n=\lfloor 1/x\rfloor}^\infty\frac{x^n}{n} $

posted 2y ago by r~~‭  ·  edited 2y ago by r~~‭

Answer
66%
+2 −0
Q&A Do linear and group invariant functions allowed to go inside(?) integral operators?

posted 2y ago by r~~‭

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66%
+2 −0
Q&A Why $\color{red}{k\dbinom{k}{1}} \neq$ "first choose the k team members and then choose one of time to be captain"?

posted 3y ago by r~~‭

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66%
+2 −0
Q&A A formal-logic formula for decimal to binary conversion

posted 3y ago by r~~‭  ·  edited 3y ago by r~~‭

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66%
+2 −0
Q&A What is the parallel for edges?

posted 3y ago by r~~‭

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66%
+2 −0
Q&A What're the orders for equation expressing?

posted 3y ago by r~~‭  ·  edited 3y ago by r~~‭

Answer
60%
+1 −0
Q&A 2 construals "of 100 patients presenting with a lump like the claimant’s in Gregg v Scott, 42 will be ‘cured’ if they are treated immediately."

posted 1y ago by r~~‭

Answer
60%
+1 −0
Q&A difference between quotient rule and product rule

posted 3y ago by r~~‭

Answer
60%
+1 −0
Q&A How does the change of variable $\color{red}{r↦n−r}$ transmogrify $\sum\limits_{r=0}^n2^{n-r}\binom{n+r}{n}=2^{2n}$ into $\sum\limits_{k=0}^{n} \frac{\binom{2n-k}{n}}{2^{2n-k}}=1$?

posted 3y ago by r~~‭

Answer
60%
+1 −0
Q&A How can a 15 year old construe the LHS of Generalized Vandermonde's Identity, when it lacks summation limits and a summation index?

posted 3y ago by r~~‭  ·  edited 3y ago by r~~‭

Answer
60%
+1 −0
Q&A How does $\lim\limits_{n \to \infty} \dfrac{p[s + (1 - s)c^n]}{p[ s + (1 - s)c^n] + (1 - p)[s + (1 - s)w^n]} = p?$

posted 3y ago by r~~‭

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60%
+1 −0
Q&A How can I deduce which operation removes redundacies?

posted 4y ago by r~~‭

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60%
+1 −0
Q&A Find limits of integration in polar coordinates

posted 3y ago by r~~‭  ·  edited 3y ago by r~~‭

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60%
+1 −0
Q&A What to do when there's lot of function of time? (For integration) Should I consider them as constant?

posted 3y ago by r~~‭

Answer
50%
+0 −0
Q&A How can "information about the birth season" bring "at least one is a girl" closer to "a specific one is a girl"?

posted 3y ago by r~~‭

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50%
+0 −0
Q&A Can the bijection for the Lost Boarding Pass Probability Problem, be formulated or pictured?

posted 3y ago by r~~‭

Answer
50%
+3 −3
Meta Is ‘How would you know to do the next step?’ always a bad question?

posted 3y ago by r~~‭

Answer
50%
+3 −3
Meta Is ‘How would you know to do the next step?’ always a bad question?

3 answers  ·  posted 3y ago by r~~‭  ·  last activity 3y ago by Professor Seve Park‭

Question discussion allowed-questions
50%
+0 −0
Q&A How to derive some trigonometric formulas?

posted 3y ago by r~~‭

Answer
50%
+0 −0
Q&A $\sum_{k=0}^{n} \binom{n}{k}=2^{n} \overset{?}{\iff} \sum_{k=0}^{n} \binom{2n+1}{k}=2^{2n}$

posted 3y ago by r~~‭

Answer
50%
+0 −0
Q&A If k = 1, why $n(n-1) \dots \color{red}{(n-k+1)} = n$?

posted 3y ago by r~~‭

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+0 −0
Q&A Why mustn't the proportion of smokers among married people be the same as the proportion of smokers in the whole population?

posted 3y ago by r~~‭

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50%
+0 −0
Q&A How can I generalize a picture for the Mean Value Theorem to the Generalized MVT?

posted 4y ago by r~~‭

Answer