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3h
comment Solutions to the integral $\int \frac {dx}{2\sqrt x (x+1)}$
one does not solve integrals but evaluates them.
18h
comment Why $ \int_0^{\infty} du \, \frac{e^{-3 u} - e^{-4 u}}{u} = \int_0^{\infty} du \, \int_3^4 dt \, e^{-u t} \\ $?
@Timbuc : I see thank you
Nov
14
comment Why did Frank Drake choose these math equations for the Voyager Golden Record?
That is pretty insightful, what books or internet sources would you recommend for a reading list?
Oct
31
comment Is zero odd or even?
youtube.com/watch?v=8t1TC-5OLdM
Oct
31
comment Is zero positive or negative?
youtube.com/watch?v=8t1TC-5OLdM
Oct
29
comment find common ratio of $\sum_{k=1}^\infty \frac{1}{k(k+1)}$
partial fraction it
Oct
23
comment Integrate $\int\sqrt\frac{\sin(x-a)}{\sin(x+a)}dx$
Did you type all of this or is there a software to help with all the latex?
Oct
21
comment Without actually calculating the value of cubes find the value of $(1)^3+(2)^3+2(4)^3+(-5)^3+(-6)^3$. Also write the identity used
What did you try?
Oct
18
comment infinitely many
please improve the title by making it more descriptive of the question
Oct
18
comment $A_1 \cap A_2 \cap \cdots \cap A_n \ne \emptyset$ holds for all $n$. Must it be that $\bigcap_{n = 1}^{\infty} A_n \ne \emptyset$?
@NajibIdrissi : Ahaa! I didn't read the question either :)
Oct
18
comment $A_1 \cap A_2 \cap \cdots \cap A_n \ne \emptyset$ holds for all $n$. Must it be that $\bigcap_{n = 1}^{\infty} A_n \ne \emptyset$?
@NajibIdrissi: yes he did,this is a counter example.
Oct
18
comment What is a closed form for ${\large\int}_0^1\frac{\ln^3(1+x)\,\ln^2x}xdx$?
Holy hell, there must be easier ways than that!
Oct
18
comment Integral of $\int_0^{2\pi} \frac{e^{-it }dt}{e^{it}-z}$
Did you use a software or did you type it out in latex? If you used a software then what is it?
Oct
18
comment What is a closed form for ${\large\int}_0^1\frac{\ln^3(1+x)\,\ln^2x}xdx$?
Did you use some software to compose this or did you type it all in MathJax by hand?
Oct
16
comment Quantifying infinitely large sums such as $\sum_{x\in\mathbb{R}^+} x$
The summation notation used is intuitive and should be left as it is.
Oct
16
comment Convergence of infinite product of prime reciprocals?
@ManRow : I was aware of that example, there was a comment that contained "convergence to 0" in case of infinite products that is no correct, they only diverge to 0.
Oct
16
comment Convergence of infinite product of prime reciprocals?
In case of infinite products they do not converge to zero, they diverge to zero
Oct
16
comment Convergence of infinite product of prime reciprocals?
What does the few expanded product to series look like?
Oct
14
comment Log integrals II
Is this math.stackexchange.com/questions/967189/log-integrals-i Log integrals I?
Oct
9
comment Consequences of irrationality of e
math.stackexchange.com/questions/456097/…