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Nov
5
answered Inequality proof by induction, what to do next in the step
Oct
19
answered There are 10 different people at a party. How many ways are there to pair them off into a collection of five pairings?
Jul
7
asked Prove that $a^3+b^3+c^3 \geq a^2b+b^2c+c^2a$
Jun
26
asked Finding the ratio of two sides of a triangle with known angles
Jun
22
asked Prove that $\sum_{i=1}^{m-1} i^k$ is divisible by $m$
Jun
16
asked choosing $5$ non consecutive books from a shelve of $12$
Jun
13
asked Proving there are no integer solutions for $3x^2=9+y^3$
Jun
8
asked Factoring a third degree polynomial
May
31
answered Counting squares of maximum size in a rectangle
May
31
asked Finding the largest $n \in \mathbb{N}$ for which $n-7$ divides $n^3-7$
May
31
answered finding the number of non-appearing integers in three different sequences
May
31
answered How to find the number of combinations of $x,y,z$ that satisfy an equation
May
30
asked Simplifying $a(a-2) = b(b+2)$
May
30
answered Divisibility and factors
May
29
asked Power tower inequality
May
28
answered Comparing $2^n$ to $n!$
May
25
answered How is “n+n/2+n/4…1” equal to “2n-1” using the formula for geometric series?
May
24
asked Finding the sum of a Taylor expansion
May
20
answered proving $n!>2^n\;\;\forall \;n≥4\;$ by mathematical induction
Jan
9
answered Is the term true? $\frac{\theta}{\theta - 1 } = \frac{1} {\theta-1} + 1$