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lab bhattacharjee earned this badge 24 times
1d ago
Which methods to use to integrate $\int{\frac{x^4 + 1}{x^2 +1}}\, dx$
may 9 at 13:42
Show that $\sqrt[3]{2+\frac {10} 9\sqrt 3}+\sqrt[3]{2-\frac {10} 9\sqrt 3}=2$
may 7 at 5:28
Find all real numbers $x$ for which $\frac{8^x+27^x}{12^x+18^x}=\frac76$
mar 30 at 17:19
Proving there are no integers $a, b, c$ satisfying $12a + 18b + 27c = 227$
mar 23 at 22:52
Prime $p$ with $p^2+8$ prime
mar 23 at 22:52
Prove that $5/2 < e < 3$?
mar 23 at 22:52
What is the value of $N$?
mar 2 at 11:32
Calculate $1\times 3\times 5\times \cdots \times 2013$ last three digits.
feb 20 at 15:25
Find all integers such that $\frac{n^3-3}{n^2-7}$ is an integer
feb 15 at 17:09
Evaluate $\sum_{k=1}^{\infty} \frac{k^2-1}{k^4+k^2+1}$
jan 19 at 3:34
Showing that $\displaystyle\int_{-a}^{a} \frac{\sqrt{a^2-x^2}}{1+x^2}dx = \pi\left (\sqrt{a^2+1}-1\right)$.
jan 10 at 10:08
how many number like $119$
jan 7 at 18:53
Proving that $\left(\frac{1}{0!}+\frac{1}{1!}+\frac{1}{2!}+\frac{1}{3!}+\cdots+\frac{1}{n!}\right)$ has a limit
dec 24 at 23:56
Help me solve this olympiad challenge?
dec 13 at 19:46
How to solve $x^{1/2}-x^{1/3} = 0$
nov 5 at 10:01
Prove that an expression is divisible by a polynomial
oct 25 at 13:31
Integrating $\frac{\log(1+x)}{1+x^2}$
sep 25 at 1:35
Why is the last digit of $n^5$ equal to the last digit of $n$?
sep 22 at 18:39
equation $\frac{2008\cdot2006\cdot2004\cdots1006}{1\cdot3\cdot5\cdots1003}=4^x $
sep 16 at 8:09
Why does $\tan^{-1}(1)+\tan^{-1}(2)+\tan^{-1}(3)=\pi$?
sep 8 at 14:48
How to solve $x^3=-1$?
sep 2 at 20:57
How to check if a point is inside a rectangle?
aug 30 at 10:45
Calculating :$((\sqrt{3} + \tan (1^\circ)).((\sqrt{3} +\tan(2^\circ))…((\sqrt{3}+\tan(29^\circ))$
jul 22 at 6:39
Factorise the determinant $\det\Bigl(\begin{smallmatrix} a^3+a^2 & a & 1 \\ b^3+b^2 & b & 1 \\ c^3+c^2 & c &1\end{smallmatrix}\Bigr)$

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