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curryage

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25 How do you prove ${n \choose k}$ is maximum when $k$ is $ \lceil \tfrac n2 \rceil$ or $ \lfloor \tfrac n2\rfloor $? Mar 23 '14
12 What does a probability of $1$ mean? May 24 '13
7 Selection from identical objects - distinction between number of ways and number of outcomes May 3 '14
5 Evaluate $ \int_{-\pi/2}^{\pi/2} \frac{\cos(x)}{1+e^x} dx$ [duplicate] Apr 27 '14
4 Solving recurrence relation of the form $T(n)=T\left(\frac{nb}{a}\right)+T\left(\frac{(n-b)c}{a}\right)+n$ May 14 '13
3 Expected length of a stick broken into two pieces — explaining the length function and PDF Mar 24 '14
3 Condition for writing an infinite summation of a sequence as a limit May 17 '14
2 Condition for convergence of the series $S = \frac{a}{b}+\frac{a(a+1)}{b(b+1)} + \frac{a(a+1)(a+2)}{b(b+1)(b+2)} + \ldots $ Apr 29 '14
2 Why do special solutions of $Ax=0$ form a basis for null-space of $A$? May 29 '14
2 Check diagonalizability of a matrix without using eigen properties Sep 5 '14
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