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jacob
  • Member for 10 years, 7 months
  • Last seen more than 4 years ago
32 votes
5 answers
270k views

When to do u-substitution and when to integrate by parts

18 votes
4 answers
50k views

Prove $SST=SSE+SSR$

11 votes
5 answers
2k views

Matrix raised to 14th power

11 votes
4 answers
603 views

Calculate $f^{(25)}(0)$ for $f(x)=x^2 \sin(x)$

9 votes
1 answer
7k views

Proof of "Eigenvectors corresponding to different eigenvalues are linearly independent." [duplicate]

8 votes
3 answers
242 views

Solve $\int_{0}^{\infty}\frac{\sin^{2}x}{x}\ dx$

8 votes
7 answers
9k views

Integrate $e^{ax}\sin(bx)?$

8 votes
4 answers
1k views

Compute $\int_0^\infty \frac{dx}{1+x^3}$

6 votes
1 answer
4k views

Limit and ln switch

6 votes
2 answers
6k views

Bijective check with matrix

5 votes
3 answers
1k views

What is the probability that when you place 8 towers on a chess-board, none of them can beat the other.

5 votes
1 answer
2k views

Solving $\arccos(11/14)+\arcsin(-1/7)=x$

5 votes
3 answers
6k views

How to solve: $\arccos(2x)-\arccos(x)=\pi/3$

5 votes
2 answers
9k views

derivation of simple linear regression parameters

5 votes
2 answers
3k views

Prove quotient of two $N(0,1)$ is $\text{Cauchy}(0,1)$

4 votes
1 answer
58 views

Solid of revolution vs $\iiint$

4 votes
2 answers
437 views

Compute $\int \limits_{\cos x}^{\sin x} \sqrt{1 - t^2}\mathrm dt$

4 votes
2 answers
167 views

Prove that $x^n+x^{-n} \in \mathbf{N}$ if $x+\frac1x \in \mathbf{N}$

3 votes
3 answers
124 views

Solve $x^2+(-7-4i)x+9+15i=0.$

3 votes
2 answers
12k views

X follows an exponential distribution, calculate Expected value of sqrt(X).

3 votes
2 answers
479 views

Concave Convex $e^{-x}-e^{-2x}$

3 votes
1 answer
71 views

Algebra problem - length of vector

3 votes
1 answer
9k views

Compute $\int_0^{1/2} (\arcsin(x))^2 dx$

3 votes
3 answers
857 views

system of equation with 3 unknown

3 votes
1 answer
872 views

Expectation by conditioning

2 votes
2 answers
109 views

Solving problems using the *definition* of differentiability

2 votes
2 answers
2k views

diagonalize a non-normal matrix , without distinct eigenvalues

2 votes
1 answer
632 views

How to find $A=UDU^H$ in this case

2 votes
2 answers
564 views

recursive formulas

2 votes
2 answers
1k views

maximum likelihood - estimate $\sigma^2$ in $N(0,\sigma^2)$

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