Koba
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### Questions (47)

 12 Derivative of the $f(x,y)=\min(x,y)$ 4 Proving that matrix $B=C$ 3 Using the definition of a concave function prove that $f(x)=4-x^2$ is concave (do not use derivative). 3 Change of variables in double integral. Finding limits of integration 3 Is the “first nonzero digit” function surjective?

### Reputation (638)

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 3 Using the definition of a concave function prove that $f(x)=4-x^2$ is concave (do not use derivative). 3 Continuous second order partial derivates in open region R 3 To determine whether the integral $\int_0^{\infty} \frac{\sin{(ax+b)}}{x^p} \,\mathrm dx$ converges for $p>0$ 1 Probability: Find a value to make this equation hold true 1 How to solve $\sinh x = x$?

### Tags (35)

 5 multivariable-calculus × 17 3 improper-integrals 5 calculus × 8 2 differential-equations × 6 4 economics × 9 1 derivatives × 3 4 convex-analysis × 6 1 probability × 2 3 integration × 2 1 graphing-functions

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