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Mathematics : Recent Questions and Answers (Page 182)

Find answers to your questions about Mathematics or help others by answering their Mathematics questions.

What is sum of the Bernoulli numbers?

$$sum_{n=0}^infty B_n = ?$$ I tried Wolfram Alpha but I can't seem to get the input correct....

Asked on 12/08/2020 by zerosofthezeta

2 answer

Composition of two power series. We can compose two power series and get one power series. But why?

I am reading "Lectures on Complex Function Theory" by Takaaki Nomura. In this book, the author wrote like this:Let $f(z) = sum_{n=1}^infty a_n z^n$.Let $g(w) = sum_{n=0}^infty...

Asked on 12/08/2020 by tchappy ha

1 answer

How much land space is required to meet the energy needs of the United States with solar?

The calculations I made below with current data suggest that over half the land of the United States would be needed. Is this indeed an accurate estimate? The United States...

Asked on 12/07/2020 by Dev Dhruv

0 answer

Outer measure question (disjoint set st $lambda^*(A cup B) < lambda^*(A) + lambda^*(B)$)

Let $lambda^*$ be the outer measure on $mathcal{P}(mathbb{R})$. Is it true that there exist $A,B in mathcal{P}(mathbb{R})$ such that$$A cap B = emptyset$$ and ...

Asked on 12/07/2020 by Julian Vené

1 answer

Show that $mathbb{Z}[sqrt{3}]$ is dense in $mathbb{R}.$

Here is the question I want to answer: Show that $mathbb{Z}[sqrt{3}]$ is dense in $mathbb{R}.$ I got this hint: Hint: Find $u in mathbb{Z}[sqrt{3}]^*$ with $u...

Asked on 12/07/2020 by Confusion

1 answer

Row Rank and Column vectors of Matrix

For matrix $A in M_{m×n}$, let the rank be k and $r_1 , . . . , r_k$ be a subset of rows of A forming a basis...

Asked on 12/07/2020 by james black

1 answer

Applying the M-L estimate

Show that $lim_{Rtoinfty}$$oint_{|z|=R}$ $frac{P(0)}{zP(z)} =0$. We are given that $P(z)$ is a non-constant polynomial in $z$, and that $P(z) neq 0$. Here is my attempt...

Asked on 12/07/2020

1 answer

Stuck on Mathematical Induction Proof

I have the following question: Prove with mathematical induction that $3^n+4^nle 5^n$ for all $nge 2$.$$text{Assume true: }3^n+4^n le 5^n text{. Prove that $3^{n+1}+4^{n+1} le 5^{n+1}$}...

Asked on 12/07/2020 by E__

2 answer

Depleted batteries

Accidentally, two depleted batteries got into a set of five batteries. To remove the two depleted batteries, the batteries are tested one by one in a random order. Let the...

Asked on 12/07/2020 by Francesco Totti

0 answer

Sphere's surface area element using differential forms

I am trying to use differential forms to determine the surface area element for a sphere. For a sphere of radius $r=1$. I think I am loosing something in...

Asked on 12/07/2020 by Cryo

2 answer

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