Discrete Math Problem Find a formula for (1 / (1 · 2)) + (1 / (2 · 3)) + (1 / (3 · 4)) + . . . + (1 /(n(n + 1) )
134202
Proof by Induction - Math
110262
Finding a closed formula for $1\cdot2\cdot3\cdots k +\dots + n(n+1)(n+2)\cdots(k+n-1)$
37650
Find $\sum_{m=0}^n\ (-1)^m m^n {n \choose m}$
108747
A simple permutation question - discrete math
100336
Find an integer having the remainders $2,3,4,5$ when divided by $3,4,5,6$, respectively.
71591
Formula for completing the square?
152113
Formula to this pattern? $1$, $11$, $21$, $1211$, $111221$, $\ldots$
48655
Find all n such that : $3 \mid (n2^{n}+1)$
23835
Discrete mathematics - Find all integer solutions of the equation $a^2+ b^2 + c^2=a^2 b^2$.
147635
Find the sum $\frac{1}{2\cdot 3}+\frac{1}{3\cdot 4}+\dots+\frac{1}{99\cdot 100}$
145444
Solve $\dfrac{1}{1+\frac{1}{1+\ddots}}$
149685
Formula for $\sqrt{a-\sqrt{a+\sqrt{a+\ldots}}}$
148906
Finding integers $m,n$ such that $(m-n)^2=4mn/(m+n-1)$
79170
$1 + \frac{1}{1+2}+ \frac{1}{1+2+3}+ ... + \frac{1}{1+2+3+...+n} = ?$
142008
Find all natural numbers $n$ such that ${(n+1)}^{1/2}-{(n-1)}^{1/2}$ is rational
93227
Change the Recursive Relation into Formula : $f(n,k) = f(n-1,k) + f(n-2, k-1)$
149759
Problem on multiplication formulae.