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Jul
4
answered Solve $\lim_{x\to 0} \frac{\sin x-x}{x^3}$
Jul
4
answered Is my theorem correct? $f(x) \leq g(x)$ for $x\geq a$ iff $f'(x) \leq g'(x)$ for $x\geq a$ and $f(a)=g(a)$.
Jul
3
answered $\cos x -1+\frac{x^2}{2!} \geq 0$ for every $x\in \mathbb{R} $
Jul
3
answered When does $(a,b) \to (2a, b-a)$ terminate? ($a \leq b$)
Jun
26
answered How do I apply the $\pm4$ part of the equation $5F_n^2\pm~4=L_n^2$ without knowing $n$?
Jun
26
answered Evaluating a sum with Mobius function
Jun
26
answered Doubt on locus of a median point
Jun
26
answered Inequality for harmonic means
Jun
17
answered Proving that a sequence is monotone and bounded
Dec
14
answered Find a number leaving a particular remainder with 3 different numbers
Nov
29
answered Find $a_{n+1}=\frac{a_n^2+1}{2}$ in terms of $n$.
Nov
29
answered Show that $n-kl$ is a perfect square
Nov
29
answered Nspire CAS spitting out a wrong answer?
Nov
29
answered What is the value of $ a_{2009}$
Nov
29
answered Finding the radius of convergence of the given power series.
Nov
29
answered How to show $(mn)!$ divides $(m!)^n$?
Nov
29
answered Proof that the limit of a sequence is equal to the limit of its partial sums divided by n
Nov
29
answered Number of solutions in a given interval
Sep
14
answered how to prove $a^{p-1} + \frac{p-1}{2\cdot 1}a^{p-2} + \frac{(p-1)(p-2)}{3\cdot 2\cdot 1}a^{p-3} + … + a \in \mathbb{Z}$?
Aug
7
answered Limit of certain recurrence relation