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1d
reviewed Approve Problem involving subspaces and linear transformations
Apr
28
reviewed Edit Find derivative of $4\cos(x - \frac{311\pi}{180})$
Apr
28
reviewed Approve Right Triangle's Proof
Apr
22
reviewed Edit How can I prove this formula for big theta notation?
Mar
27
reviewed Approve For a Partition $P_n =\{0,1/n,2/n,…,1\}$ show $\inf U(f) = \inf\{U(f,P_n): n \geq 1\}$
Mar
3
reviewed Approve Proof for the formula of sum of arcsine functions $ \arcsin x + \arcsin y $
Mar
3
reviewed Approve Factor $16x^4-x^2y^2+y^4$
Feb
29
reviewed Approve Find the integral of $\frac{\sin(x)}{1+\sin^2(x)}$
Feb
29
reviewed Approve More than basis vectors in a space are dependent, less can't span the space proof
Feb
17
reviewed Approve Geometry proof, lost and need it explained please
Feb
11
reviewed Approve Explain “homotopy” to me
Feb
11
reviewed Reject diagonal block matrix only using matrix multiplications, no kronecker product
Feb
11
reviewed Approve Finding the volume bounded by a cylinder and a plane
Feb
8
reviewed Approve How to expand $x_1^3 + x_2^3$ with the parameters of quadratic equation
Feb
8
reviewed Reject Index is multiplicative
Feb
7
reviewed Reject How to prove that $k^3+3k^2+2k$ is always divisible by $3$?
Feb
5
reviewed Approve parametric equations, finding the range of t
Feb
5
reviewed Close Prove that if $f:[a,+\infty [\longrightarrow \mathbb R$ is uniformly continuous, then $\lim_{x\to +\infty }f(x)=+\infty $
Jan
15
reviewed Reopen Solve the equation $2φ(x)=x $ for $x\in\mathbb N^+.$
Jan
12
reviewed Close Given a complete graph of $n$ vertices $K_n$ (has all possible edges – one edge between pair of vertices).