MathDB
Today's calculation of Integral 452

Source: 2009 Gunma University entrance exam

June 23, 2009
calculusintegrationlogarithmscalculus computations

Problem Statement

Let a, b a,\ b are postive constant numbers. (1) Differentiate \ln (x\plus{}\sqrt{x^2\plus{}a})\ (x>0). (2) For a\equal{}\frac{4b^2}{(e\minus{}e^{\minus{}1})^2}, evaluate \int_0^b \frac{1}{\sqrt{x^2\plus{}a}}\ dx.