M nga v rden kar exponentiellt, med j mn takt. Det betyder att de tar en viss tid att f rdubbla sig, ungef r som ett kapital med r nta p r nta. R ntan r den rliga tillv xttakten. It is sometimes claimed that the development of computers is ever accelerating, and we will all get behind. That is not quite true.
Many values increase exponentially, at a constant rate.
This means they take a certain time to double, just like a bank account. The interest is the growth rate. If we draw a time diagram with a logarithmic vertical scale, we will see straight lines. In August 1995, the world's cellular telephone systems had a total of 60 million subscribers. Between 1990 and 2000, the number of telephone exchange lines in the global network is expected to double to 1 billion.