MathDB
Today's calculation of Integral 575

Source: 2010 Kumamoto University entrance exam/Medical

March 4, 2010
calculusintegrationfunctionlogarithmstrigonometrycalculus computations

Problem Statement

For a function f(x)\equal{}\int_x^{\frac{\pi}{4}\minus{}x} \log_4 (1\plus{}\tan t)dt\ \left(0\leq x\leq \frac{\pi}{8}\right), answer the following questions. (1) Find f(x) f'(x). (2) Find the n n th term of the sequence an a_n such that a_1\equal{}f(0),\ a_{n\plus{}1}\equal{}f(a_n)\ (n\equal{}1,\ 2,\ 3,\ \cdots).