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6h
answered Is it true that $\int_a^b f(y)y' dx = \int_{y(a)}^{y(b)} f(y)dy$?
7h
reviewed Approve Increasing/Decreasing intervals of a parabola
8h
revised Let $F$ be a field and $R$ a finitely generated $F$-algebra. Let $P$ be a maximal ideal of $R$. Then $\dim(R/P)$ as a vector space over $F$ is finite.
added 26 characters in body; edited title
8h
reviewed Reject Use determinants to calculate the area bounded by 3 vectors
8h
reviewed Edit The value of $1+2\alpha+3\alpha^{2}+…+n\alpha^{n-1}$ for complex $\alpha$
8h
revised The value of $1+2\alpha+3\alpha^{2}+…+n\alpha^{n-1}$ for complex $\alpha$
Changed title to something more saying
1d
revised What is the difference between $A^{-1}$ and $A^\Theta$?
added 3 characters in body
1d
revised Proving that a linear functional is matrix trace
added 29 characters in body
1d
revised Fourier Decompositon
deleted 2 characters in body
1d
revised Two indefinite integral problems.
deleted 9 characters in body
1d
answered Writing a function in a part that is linearly dependent on the dependent variable
1d
comment solving a partial differential equation
Why not using latex markdown instead of an image to show your work?
Apr
2
revised Why are there four solutions to $x^2-2x-8=0$ in $\mathbb{R}$? Or am I wrong?
added 12 characters in body
Feb
12
reviewed Approve Is there a size of rectangle that retains its ratio when it's folded in half?
Feb
1
revised Maximizing inner product of unit vectors
added 32 characters in body
Feb
1
comment Find $\int_{-1}^3xf(x)\,dx$ where $f(x)=\min(1,x^2)$
Your answer seems correct.
Feb
1
revised Find $\int_{-1}^3xf(x)\,dx$ where $f(x)=\min(1,x^2)$
added 12 characters in body
Jan
31
revised Evaluation of integral $\int_{0}^{\infty}\frac{\sin x}{x\left ( 1+x^2 \right )^2}\,{\rm d}x$
edited title
Jan
31
revised Let $k \geq 2 \in \mathbb{N}$ Show that each of $k! +2, k! +3, … , k! +k$ is composite.
added 2 characters in body; edited title
Jan
26
awarded  Yearling