Dostre

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392 reputation

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	age	21
visits	member for	1 year, 1 month
	seen	May 20 at 5:27
stats	profile views	75

Economics major with math concentration at Drexel. At the same time I am an athlete. I play basketball.

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37 Questions

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4	Derivative of the $f(x,y)=\min(x,y)$
4	Proving that matrix $B=C$
3	Find equation of a plane that passes through point and contains the intersection line of 2 other planes
3	Using the definition of a concave function prove that $f(x)=4-x^2$ is concave (do not use derivative).
2	Nonhomogeneous second order ODE

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392 Reputation

+5	What is Putnam exam/competition?
+8	Solving an equation with $x$ as powers
+10	How to solve $\sinh x = x$?
+10	To determine whether the integral $\int_0^{\infty} \frac{\sin{(ax+b)}}{x^p} \,\mathrm dx$ converges for $p>0$

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12 Answers

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2	To determine whether the integral $\int_0^{\infty} \frac{\sin{(ax+b)}}{x^p} \,\mathrm dx$ converges for $p>0$
2	Using the definition of a concave function prove that $f(x)=4-x^2$ is concave (do not use derivative).
1	How to solve $\sinh x = x$?
1	Solutions to Differential Equations - real, real repeating, and imaginary (for economics)
1	Level Sets, Curves, and Surfaces

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28 Tags

3 homework × 26	2 integral × 2
3 economics × 9	2 improper-integrals
3 calculus × 7	1 differential-equations × 6
3 convex-analysis × 6	1 exponential-function
2 multivariable-calculus × 17	1 graphing-functions

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$Mathematics Stack Exchange$	Mathematics	392 rep	216
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	Physics	123 rep	4

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