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comment If I draw two cards, what is the probability that either is an ace?
Someone edited mine and made it incorrect, and then someone down voted it. I've fixed it.
Dec
19
revised If I draw two cards, what is the probability that either is an ace?
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awarded  Announcer
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comment Continuity of improper integral with a continuous integrand.
Yes! That's the most important part.
Dec
19
answered Continuity of improper integral with a continuous integrand.
Dec
19
answered If I draw two cards, what is the probability that either is an ace?
Dec
13
answered Proving a polynomial is irreducible over a field.
Dec
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asked Quotients with connected preimages of points
Nov
13
accepted What conditions allow a metric on an open ball to be completed to a closed ball?
Nov
6
comment Why is it not true that $\int_0^{\pi} \sin(x)\; dx = 0$?
@PatrickDaSilva Lol you're right, I'm so embarrassed. I think that this works better: integrate $x^4$ from -1 to 1 with the same substitution. I believe it becomes the integral of $\sqrt{x}/2$ from 1 to 1, which gives an incorrect answer. Thanks for pointing out my silly error! If this one's wrong too, let me know.
Nov
5
comment Why is it not true that $\int_0^{\pi} \sin(x)\; dx = 0$?
@PatrickDaSilva The substitution $u=x^2$ does not work for the integral of $x^3$ from -1 to 1.
Nov
5
answered Why is it not true that $\int_0^{\pi} \sin(x)\; dx = 0$?
Nov
5
answered How to Find the value of a trigonometric function if other very complicated trigonometric equation is given?
Nov
5
answered Is the addition in modules finite $?$