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user317176
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36 votes
Accepted

How many 19-bit strings can be generated from having an even number of ones?

17 votes
Accepted

The rational function $\tan\left(n\arctan x\right)$

13 votes

Have I found all the numbers less than 50,000 with exactly 11 divisors?

10 votes

Compute $\lim\limits_{n\to \infty} \int\limits_0^1 x^{2019} \{nx\} dx$

8 votes

Can an alternating series ever be absolutely convergent?

6 votes

A doubt on a proof of $\lim \frac{\sin x}{x}$ as $x\to 0$ provided in Simmons's Calculus with Analytic Geometry

6 votes

Finding the root of $x^3+3x^2+4$ knowing the roots of $x^3+3x^2$

6 votes
Accepted

Finding the derivative of $\sqrt x$ geometrically

5 votes

There exists some real $2 \times 2$ matrix $A$, such that $A^2+A+I=0$?

5 votes

Why does compound interest exist?

5 votes

Can the equation $2^x + x = 11$ be solved without graphing?

5 votes

Units and $ax^2L^2+bxL+c=0$ in the real world?

5 votes

The number of roots for polynomials

5 votes
Accepted

Centering a Helix along an Arbitrary Vector in 3D

4 votes
Accepted

Intuitive examples of distributions where the mean is far from the most probable outcome.

4 votes

If an equation has multiple roots of same value , What does it signify?

4 votes

How would I find the equation of f(x) in terms of x and y?

4 votes
Accepted

Why does the triangle inequality not work here?

4 votes
Accepted

Problem about angle in isosceles triangle

4 votes
Accepted

How did Dr. Niven constructed the polynomial in his proof that $\pi$ was irrational

4 votes
Accepted

If A is an non-zero $2\times 2$ invertible matrix with real entries, prove that $A=trace(A)*I-det(A)*A^{-1}$

4 votes

Given that $A+B$ is invertible, prove or disprove $A(A+B)B = B(A+B)A$ as well as show that $A(A + B)^{-1}B = B(A + B)^{-1}A$

4 votes
Accepted

Series expanding from integral?

4 votes

A point is randomly selected from interior of a square with geom. prob. Find the distrib. of the area of a rectangle, its expected value and variance.

4 votes

Why does changing $dx$ to $dt$ change the value of $\frac{d}{dx}e^{x^2}$?

4 votes
Accepted

Bead on rotating wire - differential equation

4 votes

The value of $\lim_{h\to 0}\frac{\sin(a+3h)-3\sin(a+2h)+3\sin(a+h)-\sin a}{h^3}$ is?

4 votes
Accepted

Evaluate the limit $\lim_{x\to \infty}x^2\left(\sqrt{\frac{x+2}{x}}-\sqrt[3]{\frac{x+3}{x}}\right)$

4 votes
Accepted

Compute the Lipschitz constant $K$ for the function $t^2\sin(x)\cos(x)$ on the region $S$.

4 votes

Why $\omega +\omega^2 +1 = 0$

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