Ian Mateus

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1,586 reputation

621

bio	website
	location	Brazil
	age	16
visits	member for	1 year, 7 months
	seen	11 hours ago
stats	profile views	275

Typical teenager.

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21 Answers

newest activity votes

8

Is $\sqrt[3]{p+q\sqrt{3}}+\sqrt[3]{p-q\sqrt{3}}=n$, $(p,q,n)\in\mathbb{N} ^3$ solvable?

5

Sum : $\sum_{n=0}^\infty \frac{(-1)^n}{(2n+1)^3}$

4

Creating an equation from this triangle.

3

Can someone show me a proof of the general solution for 2nd order homogenous linear differential equations?

2

Integrating $\int_0^{\infty} u^n e^{-u} du $

2

Solving $ \sin x + \sqrt 3 \cos x = 1 $ - is my solution correct?

1

Logical explanation of Euler's formula

1

Solve $\frac{1}{2x}+\frac{1}{2}\left(\frac{1}{2x}+\cdots\right)$

1

Proof real coefficients complex analysis

1

Determine the values of $r$ for which the differential equation $y'+8y=0$ has solutions of the form $y=e^{rt}$

1

Integration by parts of $\int_0^\infty \! n^2 \ln(1-e^{-an}) \, \mathrm{d} n$

1

Bounding below the difference of sums

1

Showing that $\lim_{\delta \to 0^+} \frac{1}{\delta} \int_x^{x + \delta} f(t) \ \mathrm{d}t = f(x)$

1

Evaluating $\sum_{k=1}^{\infty}\frac{\sin\left(k\theta\right)}{k^{2u+1}}$ with multiple integrals

1

Where do I go wrong solving this non-homogeneous 2nd order DE?

1

How do I find the solution for these exponential equations?

0

Differential Equation Basic - please explain the detail of this step

0

What is the smallest value of $n$ for which the maximum of $f_n(x)$ occurs when $x = 3$?

0

how do you find a derivative of $y=1-\cos(x)\sin(x)$

0

Parabola from 4 approximate points

0

Prove $\cos x= 2 \cos^2{\frac{x}{2}}-1=1-2\sin^2{\frac{x}{2}}$

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