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May
10
revised Solving equations including floor function.
added 110 characters in body
May
10
answered Is $\frac{a^2+b^2}{2}=c^2$ possible?
May
10
answered How to compute series
May
10
comment Simplification of product of GP(increasing terms) and AP(decreasing terms) described below?
See artofproblemsolving.com/wiki/index.php/…
May
10
answered Solving equations including floor function.
May
10
answered Representing a Decimal as a Fraction - 2 Methods
May
10
answered How to compute the series $\sum_{n=0}^{\infty}{\frac{1}{(n+2)7^n}}$
May
10
revised Gradient of the tangent to the curve
added 42 characters in body
May
10
comment Gradient of the tangent to the curve
@xid00, $$\dfrac{d(2x^2y)}{dx}=2x^2\dfrac{dy}{dx}+2y\dfrac{d(x^2)}{dx}=\cdots$$
May
10
answered Gradient of the tangent to the curve
May
10
answered Show if $(a,p)=1$ and $x^2\equiv a\pmod{p^2}$ then $(x,p)=1$
May
10
comment Is $\cos(x) \times \cos(2x)$ the same as $\cos(3x)$
We can directly use mathworld.wolfram.com/WernerFormulas.html
May
10
answered Is $\cos(x) \times \cos(2x)$ the same as $\cos(3x)$
May
8
answered Find $19^{92} \pmod {92}$
May
8
comment Improving my method for evaluating the limit of this function
@jordix, Thanks for your observation.
May
8
revised Improving my method for evaluating the limit of this function
added 2 characters in body
May
8
answered Improving my method for evaluating the limit of this function
May
8
comment Maxima and Minima of Sin(x)/x
See calculus.subwiki.org/wiki/Sinc_function#Differentiation
May
8
answered Find remainder when $20^{13}$ is divided by $4940$
May
8
comment Consider the number $N=2015^{2015}$. What is the remainder of $N$ when it is divided by $4$? $11$? $44$?
@mataxu, See mathworld.wolfram.com/EulersTotientTheorem.html OR mathworld.wolfram.com/FermatsLittleTheorem.html