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May
19
asked Why having $ma+np=1$ implies that $m$ is the inverse?
May
17
asked A silly problem on critical points?
May
17
asked Barbeau's Polynomials: Quadratic Polynomials, 1.2.2
May
17
asked Having the roots of a polynomial, is it possible to go back and find a polynomial that have exactly these roots?
May
14
asked If $n^2=ab$ and $\gcd(a,b)=1$, show that $a,b$ are not necessarily squares.
May
14
asked What are the benefits of using reduction map and lift instead of function and inverse image?
May
14
asked In a ring, if addition is commutative, does it implies that multiplication is commutative?
May
14
asked What is $R(k,l)$?
May
6
asked Why the $GCD$ of any two consecutive fibonnaci numbers is $1$?
May
6
asked Why can't we eliminate $t$?
Apr
30
asked Is there a problem in assuming that a point is the same thing of a vector?
Apr
28
asked Why $\frac{x}{\sqrt{x+1}-1}$ can be written as $\sqrt{x+1}+1$?
Apr
27
asked At which points the tangent lines of the function $y=\cos x$ are parallel to $-\frac{1}{2}x+1$?
Apr
20
asked How to show that $0<b'<b$?
Apr
16
asked Why $-1 \leq\frac{\langle A,B\rangle}{||A||\, ||B||}\leq1$?
Apr
15
asked About the differentiability of $|x|$?
Apr
12
asked Prove that $(A,B)\sim(P,Q)$ and $(C,D)\sim (P,Q)\implies (A,B)\sim (C,D)$?
Apr
4
asked Equations of the tangent lines of $y=x^4$ at the point $(2,0)$?
Apr
3
asked What is the meaning of division for quasigroups in here?
Apr
3
asked Determine the equation of the tangent line to $P=(x_0,x_0^4)$ in $y=x^4$.