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smcc
  • Member for 5 years, 11 months
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10 votes
Accepted

When evaluating a limit by making a change of variable, how does the sign (+/-) change?

9 votes

The mean of the of a sum is the sum of the means

7 votes
Accepted

Evaluate an infinite product in a closed form $\prod\limits_{n=1}^{\infty} \frac{1}{1+\pi^{1/{2^n}}}$

7 votes

How to intuitively think of this definition

6 votes
Accepted

Is there a formal way to show that $X \cap Y \subseteq X$.

5 votes
Accepted

Interpretation of the ratio of the derivative of a function to the function.

5 votes

If $\lim_{x\to 0}\frac1{x^3}\left(\frac1{\sqrt{1+x}}-\frac{1+ax}{1+bx}\right)=l$, then what is the value of $\frac{1}{a}-\frac{2}{l}+\frac{3}{b}$?

5 votes
Accepted

Why does the "iff" wording for a biconditional imply a double implication?

5 votes
Accepted

How can I derive an asymptotic expression for the incomplete Beta function?

5 votes
Accepted

Summation over multiple arguments

4 votes

Find all solutions to $a+b+2c-d=3$

4 votes

Power set notation

4 votes

Removing my averages

4 votes
Accepted

Solving for a function

4 votes

A question about the term "depressed cubic"

4 votes
Accepted

Explanation: In how many ways can 6 things be divided between 2 people?

4 votes

Partial and total derivative of a multivariable function

4 votes

properties of sums and product of functions

4 votes
Accepted

Why is this set determined to be empty?

4 votes

what is the Nash equilibrium in a Third price auction?

3 votes

confused about published answer to a conditional probability question

3 votes
Accepted

$\frac{f(x)}{f(y)}=\frac{f(1−x)}{f(1-y)}$ and I know that $f′(x)<0, f(x)>0 $ $\forall x$, what can I say of $x$ and $y$?

3 votes
Accepted

Why is the Euclidian norm convex, if the square root function is concave?

3 votes
Accepted

Hessian of a composition of maps

3 votes
Accepted

Show that if a function is nonnegative and continuous on [a,b] then f(x)=0 for all x in [a,b]

3 votes
Accepted

How to show $ \lim_{(x,y) \to (0,0)} \frac{3x^2y^2}{x^4+y^4}=\frac{3}{2} $ using the $\epsilon$-$\delta$ notation.

3 votes

Find the maximum of $U (x,y) = x^\alpha y^\beta$ subject to $I = px + qy$

3 votes
Accepted

Find all natural numbers $n$ such that $n^{17}-n$ is divisible by 10

3 votes
Accepted

Prove that this is one-one, but not onto $\Bbb R$.

3 votes

Is there an intuitive meaning of $p - p^2$

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