Logarithms worksheet

Common and natural.

x log x ln x
.01
.1
.2
1/e=e-1
.5
1
2
e
5
10
20
e3
50
100
e5
200
500
1000

For every pair of log x and ln x what is the ratio log x / ln x and ln x / log x

ln x ≈ 2.3 log x
log x ≈ .434 ln x
2.3 and .434 are reciprocals.