Question

Evaluate the indefinite integral of sin(ln38x)/x

Answer 1

reimann sums?

Answer 2

given a function f(x) and an interval ..

the area underneath f(x) can be approximated with rectanagles of with (b-a)/n, and heights of the corresponding f(x) values:



this drawing assumes left hand heights ...
\[\large \int_{a}^{b}f(x)~dx=\lim_{n\to inf}\sum_{i=0}^{n-1} f(a+i\frac{b-a}{n})\frac{b-a}{n}\]