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visits member for 2 years, 6 months
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45m
comment Proving Euler's formula without calculus
See arcsecond.wordpress.com/2009/02/07/…
2h
answered Equation of a tangent to the graph of a function parallel to a line
3h
comment Need help solving $\;\arcsin(\sqrt3\sin x)=1$
@LonelyMathematician, Thanks. Rectified
3h
revised Need help solving $\;\arcsin(\sqrt3\sin x)=1$
added 1 character in body
3h
answered If we know $x+y+z=1$, $x^2+y^2+z^2=2$, and $x^3+y^3+z^3=3$, how to find $x^4+y^4+z^4$?
3h
answered Need help solving $\;\arcsin(\sqrt3\sin x)=1$
6h
answered If $\sqrt{n}+ 8= n+1$, what is $n$?
9h
comment How to compute $\int^{1}_{-1}f(x)dx$?
@math110, Not sure if I understood your point clearly.
18h
comment hard question, please help
See codegolf.stackexchange.com/questions/4019/…
18h
comment If we know $a^{1 / 2} + a^{-1/2}$, how can we calculate $a + a^{-1}$?
@PauloCosta, Use the formula, set $x=a^{1/2},y=a^{-1/2}$
19h
answered If we know $a^{1 / 2} + a^{-1/2}$, how can we calculate $a + a^{-1}$?
19h
comment Series with $n$th term having integer raised to the power of $n$ in the denominator
It's incorrect, we don't need it particularly though if you follow the linked answers.
19h
comment Series with $n$th term having integer raised to the power of $n$ in the denominator
The $n$th term $$=\frac{4\cdot5\cdot6\cdots(n+3)}{6\cdot9\cdot12\cdots(3n+3)},$$ right?
19h
comment Series with $n$th term having integer raised to the power of $n$ in the denominator
See math.stackexchange.com/questions/746388/…
21h
answered Quadratic formula not working?
22h
answered Vectors: $a = (1,2)$, $ b= (2,-1)$, $c = (-5, 20)$ Find values for $k$ and $l$ for $c = la + kb$
22h
comment Find all intergers such that $2n^2+1$ divides $n^3+9n-17$
@Ewin, Welcome. We still need to test for $2\le n\le8$. I'm thinking of reducing that like $n\not\equiv\pm2\pmod5$ as $153\not\equiv0\pmod5$
22h
answered Find all intergers such that $2n^2+1$ divides $n^3+9n-17$
1d
answered How to compute $\int^{1}_{-1}f(x)dx$?
1d
comment Angle in a triangle within a circle.
@ZubinMukerjee, I left it for Blakes7