396 reputation
312
bio website
location Vietnam
age
visits member for 2 years, 10 months
seen Dec 10 at 18:15

Feb
2
asked Functional Equation : $f(x) = f(x + y^2 + f(y))$
Nov
9
asked Find a shortest distance from point to $\operatorname{span} U$
Nov
9
asked Find matrix with $T: P_2 \to R^2: T(a+bx+cx^2) = (a-b, b+c)$
Nov
9
asked Find basis for $\ker T$ with $T:P_2 \to P_2: T(p(x)) = p(x) + p(-x)$
Nov
9
asked find $rank(T)$ when $T: P_2\to P_2:T(p(x)) = p(x+1)$
Nov
8
asked Find formula for transformation from $R^3$ to equation of line
Nov
6
asked Find m satisfied $\dim(U^\perp) = 2$
Nov
6
asked Find a basis of $\ker T$ and $\dim (\mathrm{im}(T))$ of a linear map from polynomials to $\mathbb{R}^2$
Nov
4
asked Prove : $\rm{col}(B) \subseteq \rm{null}(A)$
Nov
4
asked Is $ U = \{f(x)| f(x) \in P_{3}, \operatorname{deg} f(x) = 3\}$ a subspace of $P_{3}$?
Nov
2
asked Find conditions for a polynomial $p$ to be in a vector space $U$
Sep
13
asked Modulo equation : $\frac{n^{k+1}-1}{n-1} \equiv a{\pmod p}$
Aug
20
asked Matrix Manipulation : trick to sum elements of vector
Jun
15
asked Find volume of region bound by $y=x, y=x^2$ around x-axis
Jun
14
asked $s(x)$ is a arc length function, find $s'(x)$
Jun
13
asked $f(1)=-3$ and $ f'(x)\geq7$ how small is $f(5)$?
Jun
12
asked Multi variable integral : $\int_0^1 \int_\sqrt{y}^1 \sqrt{x^3+1} \, dx \, dy$
Jun
10
asked Formula to estimate sum to nearly correct : $\sum_{n=1}^\infty\frac{(-1)^n}{n^3}$
Jun
8
asked Lagrange's method to find min/max question
Jun
7
asked Partial Derivation: $\lim_{(x,y)\to(0,0)}\frac{x^2+\sin^2y}{2x^2+y}$