How Do You Calculate Error in Logarithms?

[swetha767]

hi
i want to knw the formula to find error in log

for example they give me a value of 2.6 +or- 0.1

now they say log this value and give the error

i log it and i get 1.176 ok but now how to find the error in log

i knw there is a formula but i forget it

 

[Borek]

You can always try log(2.6-0.1) and log(2.6+0.1) to check.