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SchrodingersCat
  • Member for 6 years, 9 months
  • Last seen more than a month ago
  • India
44 votes

Is there a function whose antiderivative can be found but whose derivative cannot?

34 votes

What are some examples of when Mathematics 'accidentally' discovered something about the world?

26 votes
Accepted

How to approach the ODE $y'+\sin(x+y)=\sin(x-y)$

16 votes
Accepted

Divisibility by 37 .

16 votes
Accepted

What's wrong with this logarithm calculation?

14 votes
Accepted

Summing reciprocal logs of different bases

13 votes
Accepted

Elementary proof for $\sqrt[3]{xyz} \leq \dfrac{x+y+z}{3}$

12 votes
Accepted

Solving a logarithmic equation $\log_2 (2^x-1)+x=\log_4 (144)$

11 votes
Accepted

Prove that greatest common divisor of two numbers multiplied with itself divides the product of those numbers

10 votes

Simplify triangular sum of triangular numbers: $\sum_{i=1}^{n}(\frac12i(i+1))$

9 votes
Accepted

Does $\sum_{k=1}^{\infty}\frac{k!}{k^k}$ converge?

9 votes
Accepted

Show that $m(m^2 − 7)$ for any natural m is always divisible by 6

9 votes

What's my confusion with the chain rule? (Differentiating $x^x$)

9 votes

Test of being a rational number for $(1-\frac13+\frac15-\frac17+\cdots)/(1+\frac14+\frac19+\frac1{16}+\cdots)$

8 votes

confusion about permutation

8 votes

Prove that $ \tan^{-1}\frac{1}{3} + \tan^{-1}\frac{1}{7} + ... + \tan^{-1}\frac{1}{n^2+n+1} = \tan^{-1}\frac{n}{n+2}$

8 votes

How to solve $y' + y^2 - 2y\sin x + \sin^2x = \cos x$

8 votes
Accepted

Integrating trig function

8 votes
Accepted

Approximation of square root

8 votes
Accepted

exponential equation: $6^x+8^x+15^x=9^x+10^x+12^x$

7 votes
Accepted

Solving this limit $\lim_{x\to 3}\frac{x^2-9-3+\sqrt{x+6}}{x^2-9}$.

7 votes
Accepted

Finding the solution of the congruence $4x\equiv16\pmod{26}$

7 votes
Accepted

Use integration by parts to find the integral $\int\frac{\sqrt {4x^2-9}}{x^2}dx$

7 votes

What is the function that satisfies $\int_0^x f(t) dt=constant$

7 votes

Write a formula as a sum of fractions with constant numerators

7 votes
Accepted

Checking differentiability of a piecewise function

7 votes

Integrating composite functions by a general formula?

7 votes

Prove $\sum_{k=1}^n \frac{1}{(2k-1)(2k+1)}=\frac{n}{2n+1}$

7 votes

Example of a complex transcendental number?

6 votes
Accepted

Which two integers produce random infinite sequence when the largest divided by the smallest?

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