User hqt - Mathematics Stack Exchange

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	353 reputation	bio	website		visits	member for	1 year, 3 months
29 badges		location	Vietnam		seen	May 7 at 2:21

5

6

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Multi variable integral : $\int_0^1 \int_\sqrt{y}^1 \sqrt{x^3+1} \, dx \, dy$

calculus integral

jun 13 '12 at 3:24 user17762 76.3k

2

5

votes

8

answers

518

views

Evaluating $\int_{0}^{1} \sqrt{1+x^2} \text{ dx}$

apr 6 at 13:39 Américo Tavares 20.7k

1

4

votes

4

answers

4

kviews

Find volume of region bound by $y=x, y=x^2$ around x-axis

calculus

jun 15 '12 at 18:07 André Nicolas 161k

1

4

votes

2

answers

432

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Maple: how to solving composite function

maple

may 28 '12 at 16:48 acer 696

2

4

votes

2

answers

982

views

Min/Max of $f(x,y) = e^{xy}$ where $x^3+y^3=16$

analysis inequality

may 20 '12 at 11:47 Derek Allums 857

3

votes

3

answers

186

views

$f(1)=-3$ and $ f'(x)\geq7$ how small is $f(5)$?

calculus

jun 13 '12 at 19:51 akkkk 1,428

2

votes

1

answer

104

views

Find basis for $\ker T$ with $T:P_2 \to P_2: T(p(x)) = p(x) + p(-x)$

linear-algebra transformation

nov 9 at 14:40 Julian Kuelshammer 3,625

1

2

votes

1

answer

72

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Modulo equation : $\frac{n^{k+1}-1}{n-1} \equiv a{\pmod p}$

number-theory modular-arithmetic

sep 14 at 5:46 lab bhattacharjee 28.8k

2

votes

2

answers

91

views

$s(x)$ is a arc length function, find $s'(x)$

calculus

jun 14 '12 at 18:40 DonAntonio 46.8k

2

votes

3

answers

144

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Formula to estimate sum to nearly correct : $\sum_{n=0}^\infty\frac{(-1)^n}{n^3}$

homework calculus sequences-and-series

jun 10 '12 at 15:54 Peter Sheldrick 1,145

2

votes

3

answers

155

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Does $\int_0^\infty\frac{\cos^2x}{x^2+5x+11}dx$ converge or diverge?

integral convergence

may 20 '12 at 5:33 Raja Oktovin 21

1

vote

2

answers

1

kviews

Sum of two divergence series is always divergence series?

calculus sequences-and-series convergence divergent-series

may 17 at 12:31 kathigitis 1

1

vote

1

answer

104

views

Find a shortest distance from point to $\operatorname{span} U$

linear-algebra

nov 9 at 22:37 Michael Hardy 48.2k

1

vote

1

answer

59

views

find $rank(T)$ when $T: P_2\to P_2:T(p(x)) = p(x+1)$

linear-algebra

nov 9 at 13:27 P.. 8,905

1

vote

1

answer

53

views

Find m satisfied $\dim(U^\perp) = 2$

linear-algebra

nov 6 at 20:15 EuYu 15.1k

1

vote

2

answers

220

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Find a basis of $\ker T$ and $\dim (\mathrm{im}(T))$ of a linear map from polynomials to $\mathbb{R}^2$

linear-algebra

nov 6 at 12:45 SyndicatorBBB 145

1

vote

1

answer

112

views

Lagrange's method to find min/max question

calculus

jun 8 '12 at 17:46 André Nicolas 161k

0

votes

1

answer

37

views

Is $ U = \{f(x)| f(x) \in P_{3}, \operatorname{deg} f(x) = 3\}$ a subspace of $P_{3}$?

linear-algebra abstract-algebra polynomials ring-theory

apr 26 at 3:14 Alexander Gruber♦ 15.2k

0

votes

1

answer

51

views

Find formula for transformation from $R^3$ to equation of line

linear-algebra

nov 11 at 2:13 Theo 685

0

votes

1

answer

28

views

Find matrix with $T: P_2 \to R^2: T(a+bx+cx^2) = (a-b, b+c)$

linear-algebra

nov 9 at 17:56 vesszabo 1,428

0

votes

3

answers

70

views

Prove : $\rm{col}(B) \subseteq \rm{null}(A)$

linear-algebra

nov 4 at 10:22 Marc van Leeuwen 23.9k

0

votes

1

answer

28

views

Find conditions for a polynomial $p$ to be in a vector space $U$

linear-algebra vector-spaces

nov 2 at 3:53 Michael Hardy 48.2k

0

votes

1

answer

98

views

Matrix Manipulation : trick to sum elements of vector

matrices

aug 20 at 11:19 utdiscant 1,459

0

votes

1

answer

41

views

Partial Derivation: $\lim_{(x,y)\to(0,0)}\frac{x^2+\sin^2y}{2x^2+y}$

homework calculus

jun 7 '12 at 9:15 Community♦ 1

1

0

votes

1

answer

56

views

Compute lim from Graph

limit graphing-functions

apr 16 '12 at 1:06 Community♦ 1

hqt

25 Questions