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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
21
revised 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
added 2 characters in body; edited title
Oct
21
reviewed Approve Implicit Differentiation and Tangent Lines (sin and cos)
Oct
20
revised Derivative of $e^\sqrt{4x+4}$
added 70 characters in body
Oct
20
revised Limit as x approaches 0 from the left: $\lim_{x \to 0^{-}} \sin^{-1}\left({\frac{1}{2+e^\frac{1}{x}}}\right)$
added 5 characters in body; edited title
Oct
19
revised How to compute inequality that involves logarithm
added 52 characters in body
Oct
19
revised Evaluating $\frac{\operatorname d \! \phantom x}{\operatorname d\!x}\frac{4}{\ln(x^2+2)}$
added 44 characters in body; edited title
Oct
19
revised Evaluating $\frac{\operatorname d \! \phantom x}{\operatorname d\!x}\frac{4}{\ln(x^2+2)}$
edited title
Oct
19
revised Using parametric differentiation for $\frac{\operatorname d \! y}{\operatorname d \!x}$?
added 121 characters in body; edited title
Oct
19
revised Show that the element $z=i \cos \frac{\pi}{3}+\sin \frac{\pi}{3} = i( \cos \frac{\pi}{3} - i \sin \frac{\pi}{3})$ belongs to $U_{12}$
added 102 characters in body; edited title
Oct
18
revised Differentiate $2\pi x \cos(\pi x^2)$
added 4 characters in body; edited title
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
18
reviewed Approve Integral of $\int_0^{2\pi} \frac{e^{-it }dt}{e^{it}-z}$
Oct
17
reviewed Approve How to find the 4th degree polynomial with given values at $0,1,2,3,4$?
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.