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7 votes
4 answers
534 views

Help me solve $\int \ln(2x+1)dx$

6 votes
2 answers
801 views

How are the elements of a dihedral group usually defined?

4 votes
2 answers
774 views

Does $\sum_{n=1}^{\infty}\frac {\sin{\frac 1 n}} {\sqrt n}$ converge?

3 votes
3 answers
3k views

What does it really mean for the power series of a function to converge?

3 votes
3 answers
1k views

How to solve $\int \tan^2(x) \sec (x) \ dx$? [duplicate]

2 votes
3 answers
373 views

How to solve this weird-looking equation?

2 votes
2 answers
76 views

Evaluate $\int \cos^2(x)dx$

2 votes
4 answers
126 views

How do I find the antiderivative of $sin(u)e^u$? [duplicate]

2 votes
2 answers
146 views

Why are we allowed to make trig substitutions when solving integrals?

2 votes
3 answers
118 views

Does $\sum_{n=1}^{\infty}\frac {(n^3-n^2+3)(n^{5/3})} {n^5+10^{10}n^4-1}$ converge or diverge?

2 votes
1 answer
110 views

Properties of the simplest object in n-dimension

2 votes
2 answers
2k views

Line of intersection of two planes

2 votes
1 answer
7k views

Find parametric equations for the line through the point $(0,1,2)$ that is perpendicular to the line $x=1+t, y=1-t,z=2t$ and intersects this line.

2 votes
1 answer
8k views

If $f(x,y)=\int^x_y \cos(t^2)\,dt$, find the first partial derivatives of the function

2 votes
1 answer
226 views

Some algebraic properties of curl

2 votes
1 answer
128 views

Problem 5 from Section E of Chapter 10 of Pinter's Book of Abstract Algebra

2 votes
2 answers
779 views

Defining the sigma-algebra of events of a probability space

2 votes
1 answer
1k views

What does the notation $2^{\Omega}$ mean?

1 vote
3 answers
96 views

Is it acceptable to use the inverse notation for certain elements of a non-bijective function?

1 vote
1 answer
46 views

Problem 4 from Section E of Chapter 12 of Pinter's Book of Abstract Algebra

1 vote
1 answer
74 views

Problem 4 of Section G of Chapter 13 of Pinter's Book of Abstract Algebra

1 vote
1 answer
822 views

Proving monotonicity of the regulated integral

1 vote
1 answer
2k views

(Proof clarification): Continuous functions on R must be Lebesgue measurable

1 vote
1 answer
6k views

Sketch the region of integration of $\int_0^3 \int_0^{\sqrt {9-y}} f(x,y)\ dx\ dy$

1 vote
1 answer
103 views

What is going on in this example? (Ch.5 on limits, from Spivak's Calculus)

1 vote
3 answers
85 views

Comparing divergent series - how to interpret the relationship between these two series?

1 vote
3 answers
116 views

Is this a valid proof that $\sqrt 3$ is irrational?

1 vote
0 answers
117 views

Which of these Cayley graphs are isomorphic? (Pinter, Book of Abstract Algebra, Chapter 9)

1 vote
1 answer
82 views

Finding the number of defining equations of a group

1 vote
1 answer
104 views

If a velocity vector $\vec {v(t)}$ has constant length, must its acceleration also have constant length?