Jneven

### Questions (54)

 11 Is there a way to know if a row reduction of a matrix has been done correctly? 4 Find $\lim_{n \to \infty} \left(n - \sum_{k=1} ^{n} \cos \frac{\sqrt{k}}{n} \right)$ 4 Max dimension of subspace $U\subseteq V$, where $V$ is a vector space of functions $[0,1]\rightarrow \Bbb R$ 3 $\operatorname{rank}(A) = \operatorname{rank}(B)$, Prove there exist $U, V$ invertible matrices such that: $A = UBV$ 3 find: $\lim_{n\rightarrow\infty}\frac{\sin\left(x+\frac{1}{n}\right)-\sin\left(x\right)}{\sin\left(x+\frac{1}{n}\right)}$

### Reputation (955)

 +2 What's “limit doesn't exist” multiplied by limit that equals zero? +2 Relationship between two lines +2 Problem about degree of a polynomial and determinant +10 Find limit $\lim_{x \rightarrow 0^+} \frac{x}{x^x-1}$

 1 Find limit $\lim_{x \rightarrow 0^+} \frac{x}{x^x-1}$ 1 Why is the expression: $\frac{1}{x} \geq e^{-x}$ is different then the expression: $e^{x} \geq x$? 1 Name of a matrix with one column and row removed 0 Solve the equation $x^2 + 4(\sqrt{1 - x} + \sqrt{1 + x}) - 8 = 0$ 0 Need help finding solution of equation coinciding with span of matrices.

### Tags (52)

 1 linear-algebra × 22 1 education 1 matrices × 14 0 elementary-set-theory × 18 1 calculus × 14 0 relations × 12 1 real-analysis × 13 0 functions × 11 1 inequality 0 linear-transformations × 11

### Account (1)

 Mathematics 955 rep 422