这数学题该怎么理解T-T

on a scale that measures the intensity of a certain phenomenon,a reading of n+1 corresponds to an intensity that is 10 times the intensity corresponding to a reading of n.on that scale,the intensity corresponding to a reading of 8 is how many times as great as the intensity corresponding to a reading of 3?

题目给出一个计算公式 设这个运算为F好了

F(n+1)=10F(n)   "reading of n+1 corresponds to an intensity that is 10 times..."

然后就是F(8)是F(3)的几倍问题

F(8)=10F(7)=100F(6)=1000F(5)=10000F(4)=10的五次方F(3)