DRPR

### Questions (39)

 3 Show that $\operatorname{rank}(A)=\operatorname{rank}(B)$ [duplicate] 3 Let $f \colon \mathbb{R} \to \mathbb{R}$ be an infinitely differentiable function 3 Evaluate $\lim_\limits{n\to \infty} e^{-n}\sum_\limits{j=n}^{j=4n} \frac{n^j}{j!}$ [closed] 3 Prove that $B$ is non singular and that $AB^{-1}A=A$ 2 Find the solutions to:$\frac{d^2y}{dx^2}=\left(\frac{dy}{dx}\right)^2$.

### Reputation (713)

This user has no recent positive reputation changes

 1 How to show that $U_{2}$ is a uniform random variable? 1 Why is a term that comes out of a variance bracket is squared? 1 How was the area formula for a circle ($A = \pi r^2$) derived before the introduction of calculus? 1 Mathematical Statistics course 0 Independence between error and regressor

### Tags (0)

This user has not participated in any tags

### Bookmarks (22)

 58 Is there a step by step checklist to check if a multivariable limit exists and find its value? 50 Do matrices $AB$ and $BA$ have the same minimal and characteristic polynomials? 29 If two matrices have the same eigenvalues and eigenvectors are they equal? 21 For $\det(A)=0$, how do we know if $A$ has no solution or infinitely many solutions? 20 Proving ${\sum_{n=1}^\infty {1\over F_n}} <4$

### Accounts (5)

 Mathematics 713 rep 55 silver badges1313 bronze badges Stack Overflow 249 rep 22 silver badges99 bronze badges Cross Validated 165 rep 55 bronze badges Anime & Manga 101 rep 11 bronze badge Movies & TV 101 rep 11 bronze badge