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Dec
14
answered Prove or disprove the statement: if all the eigenvalues of a matrix are 0, then the matrix must be the zero matrix?
Dec
14
asked scores of individuals and evaluation
Dec
14
asked distribution of the difference of discrete uniform RVs
Dec
8
answered $\cos(x)$ strictly increasing on $(-\pi,0)$
Dec
8
asked $\cos(x)$ strictly increasing on $(-\pi,0)$
Nov
21
asked $\lim_{x \to \infty} x\sin(\frac{1}{x}) = 1$ (epsilon-delta like condition)
Sep
17
answered Finding probability given mean and standard deviation
Jul
8
answered How to determine if it is l'Hopital's or not?
Jun
26
answered How to express $\lnot (a < b < 0)$ or the contrapositive of this statement?
Jun
24
answered function, strange formula from Discrete mathematics
Jun
24
answered Solving $2x+8=6x-12$ by using the guess and check method
Jun
23
answered Proving associativity on $\mathbb{Q}$
Jun
23
answered The chain rule: differentiation in several variables
Jun
22
answered How can det(B)=-det(A) when this happens?
Jun
20
answered Proof that intersection of two subspaces is {0}
Jun
16
answered Hypothesis testing: Test statistic, P-value and significance levels
Jun
15
answered simple vector multiplication
Jun
14
answered Probability of Either of Two Teams Winning the World Cup
Jun
14
answered Method of Lagrange multipliers to find all critical points of a function
Jun
12
answered How to draw a distribution of the function?