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56 votes

Any smart ideas on finding the area of this shaded region?

geometry recreational-mathematics puzzle area asked Jul 29, 2016 at 9:09
math.stackexchange.com

29 votes

Is there other methods to evaluate $\int_1^{\infty}\frac{\{x\}-\frac{1}{2}}{x}\ \mathrm dx$?

calculus integration definite-integrals improper-integrals asked Dec 6, 2014 at 8:34
math.stackexchange.com

17 votes

Did Alfred Nobel collect his wealth by selling dynamite?

biographical-details nobel-prize chemists asked Nov 12, 2014 at 12:47
hsm.stackexchange.com

15 votes

What are other methods to evaluate $\int_0^1 \sqrt{-\ln x} \ \mathrm dx$

calculus integration definite-integrals improper-integrals asked Dec 25, 2014 at 11:41
math.stackexchange.com

13 votes

How to solve this to find the Null Space

linear-algebra vector-spaces asked Oct 29, 2014 at 13:05
math.stackexchange.com

13 votes

Help me to finish calculating $\int_0^{\infty} \frac{1}{x^3-1}dx$

calculus integration definite-integrals cauchy-principal-value asked Nov 12, 2014 at 15:48
math.stackexchange.com

7 votes

Please help me find a complex number book suitable for me

reference-request complex-numbers book-recommendation asked Oct 28, 2014 at 10:26
math.stackexchange.com

7 votes

Can we interchange the Integral and Summation when a limit is $\infty$?

calculus definite-integrals summation asked Jan 29, 2015 at 7:25
math.stackexchange.com

6 votes

What is the difference between a free market and a perfectly competitive market?

microeconomics competition asked Jun 15, 2017 at 9:35
economics.stackexchange.com

6 votes

History related to the "2 litres of water per day" theory

medicine asked Nov 15, 2014 at 15:31
hsm.stackexchange.com

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