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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? Apr2 revised Why are there four solutions to $x^2-2x-8=0$ in $\mathbb{R}$? Or am I wrong? added 12 characters in body Feb12 reviewed Approve Is there a size of rectangle that retains its ratio when it's folded in half? Feb1 revised Maximizing inner product of unit vectors added 32 characters in body Feb1 comment Find $\int_{-1}^3xf(x)\,dx$ where $f(x)=\min(1,x^2)$ Your answer seems correct. Feb1 revised Find $\int_{-1}^3xf(x)\,dx$ where $f(x)=\min(1,x^2)$ added 12 characters in body Jan31 revised Evaluation of integral $\int_{0}^{\infty}\frac{\sin x}{x\left ( 1+x^2 \right )^2}\,{\rm d}x$ edited title Jan31 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 Jan26 awarded Yearling