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18h
awarded  trigonometry
23h
answered Finding the Value of K in an Integral Function
23h
comment Finding the Value of K in an Integral Function
@Panthy: Check again your first integral.
23h
answered How to raise a matrix to the power of $13$ without boring, repetitive multiplication?
23h
reviewed Leave Open Is it still possible for their to exist a well-ordering on the reals such that there is always a least next element?
23h
reviewed Close Find the side length of shortest equilateral triangle with given conditions.
23h
reviewed Leave Open Interaction of solid objects and change of trajectory
23h
reviewed Close Does anyone have any good resources for learning high level maths.
23h
reviewed Close Find parameters of short geometric series
23h
reviewed Leave Open Prove or find a counter example to the claim that for all sets A,B,C if A ∩ B = B ∩ C = A ∩ C = Ø then A∩B∩C ≠ Ø
23h
reviewed Close Deriving $A \rightarrow ( B \rightarrow C ) \rightarrow ( ( A \rightarrow B ) \rightarrow ( A \rightarrow C ) )$ in the sequent calculus
23h
reviewed Close Logical expression
1d
answered Find $\lim_{x\to0}\frac{\sin5x}{\sin4x}$ using $\lim_{\theta\to0}\frac{\sin\theta}{\theta}=1$.
1d
comment Finitely generated abelian groups: If $G \times K$ is isomorphic to $H \times K$, then $G$ is isomorphic to $H$.
@SamiBenRomdhane: Thanks! And a positive one for your recent post in return. :+)
1d
comment Why does $\sum_{k=1}^{\infty} \frac {(-1)^{k-1}}{k}$ converge conditionally?
@MrWho: What I 've known from using this test, tells me that It doesn't show if the series con. or div.
1d
comment Why does $\sum_{k=1}^{\infty} \frac {(-1)^{k-1}}{k}$ converge conditionally?
@MrWho: I think using that test makes |u_{n+1}/u_n|->1 so it fails to give us desired result.
1d
comment Why does $\sum_{k=1}^{\infty} \frac {(-1)^{k-1}}{k}$ converge conditionally?
@MrWho: See Leibnitz Theorem.
1d
reviewed Close A limit question
1d
reviewed Leave Open How to prove that $f:\left]-5,5\right[\to \left[0,1\right], \ x\mapsto e^{-x^2}$ is surjective?
1d
reviewed Approve suggested edit on Change of basis of linear map