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Jan
13
revised Compute $f^{(22)}(0)$ where $f(x)= \sin(x)/x$ if $x\neq0$ and $1$ if $x=0.$
deleted 5 characters in body
Jan
13
revised For a continuous function $f$ show $\exists c\in (0,1)$ s.t $f(c)=3c^2$
edited tags
Jan
13
revised Limit of a sequence of a function
added 4 characters in body
Jan
13
revised Limit of a sequence of a function
added 9 characters in body
Jan
13
answered Limit of a sequence of a function
Jan
12
comment Proving the inequality $e^{\sin(\sqrt{2}/{7})}<11/9$ without calculator
$11/9 - e^{\sin (\sqrt{2}/7)} = 0.00001435084425...$ So if you came up with it yourself, and need a proof, don't get your hopes up. While there might be a nice proof, it is unlikely to be found...
Jan
12
comment Proving the inequality $e^{\sin(\sqrt{2}/{7})}<11/9$ without calculator
What is the source of this problem? Is it some contest problem or were you just playing around with a calculator?
Jan
12
revised Prove $\mathbb{P}( k < l/2 ) \geq \frac{l}{2} \times \mathbb{P}( k = l/4 ) $ for binomial variable $k$
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Jan
12
revised How to show $\,f(x)=3e^{2x} -10x -7x^2\,$ has a minimum on $\,[0, 1]$
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Jan
12
revised Another Division Algorithm Question.
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Jan
12
comment Algebraic expansion with complex variable…
abstract-algebra is a different subject. Please read the blurbs of the tags before using them.
Jan
12
revised Algebraic expansion with complex variable…
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Jan
12
comment Sum: $\sum_{n=1}^\infty\prod_{k=1}^n\frac{k}{k+a}=\frac{1}{a-1}$
@HansLundmark: Right! Why is it constant Jack? -1 till this is resolved.
Jan
12
revised Sum: $\sum_{n=1}^\infty\prod_{k=1}^n\frac{k}{k+a}=\frac{1}{a-1}$
removed period used to end english.
Jan
12
comment Locus of line segments
That is ok :-) just saying for future reference. (Also suggest reading the blurb of the tag...)
Jan
12
comment Locus of line segments
graph-theory is a tag about a different subject.
Jan
12
revised Locus of line segments
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Jan
12
revised Proving that $1+2^m+3^m+…n^m$ is divisible by $(n+1)$
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Jan
12
revised How to prove that every number, such that its square root is an integer, has an odd number of divisors?
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Jan
12
revised BMO preparatory question
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