Question

Guys, I really need some help.
I am very confused.

I need to know how to add and subtract logarithms.

logx66 - logx22

I cannot find a calculator that can do this.

Answer 1

is x a multiple sign or variable?

Answer 2

It's like slightly underneath log

Answer 3

But I couldn't find a way to make it small

Answer 4

? could so x66 is under log?

Answer 5

i mean so x66*

Answer 6

The x is and then it's 66
like logx66 but the x is tiny

Answer 7

OK that means that x is the base of the logarithm

one of the rules of logs is

log a - log b = log (a/b)

- true when the base of the logs is the same

Answer 8

so logx would stay the same or would it change...?

Answer 9

logx stays the same
logx 66 - logx 22 = logx 66/22 = logx 3

Answer 10

if you leave a space between the base and the number it makes it easier to understand.

Answer 11

Oh okay I sort of get it I think... You divided 66/22 to get the 3 for the answer...
and if the base is the same it will stay as logx...

Answer 12

- though you might be able to write x as a suffix in equation editor

Answer 13

If it is addition would I multiply the numbers in those spots instead of divide?

Answer 14

yea

Answer 15

right

Answer 16

Okay I have a weird one I think I might know the answer but could you check

Answer 17

log5.4 - 0.054 = log100=2? or log100=10?
@welshfella

Answer 18

i dont get that one is 5.4 supposed to be the base of the log
log on its own is taken as log to the base 10

Answer 19

log 100 is 2 because 10^2 = 100

the log is the power to which the base is taken