Question

log(x + 5) - logx = 3

Answer 1

log((x+5)/x)=3

Answer 2

One of my multiple choice answers is 2.5, would that work? It's the closet one to 3..lol

Answer 3

No 3 is not the answer @vt you have to solve the equation

Answer 4

Oh. Lol that's unfortunate. I don't have a scientific calculator.

Answer 5

use google

Answer 6

They have one?

Answer 7

yes! you will find an online calculator

Answer 8

Alright. Let's see if I can figure it out lol.

Answer 9

Remember log rules??

Answer 10

No.. I really dont have a clue tbh haha

Answer 11

This might be a little tedious for us..

Answer 12

Lol just a little.

Answer 13

Since is a difference of two logs, we use the rule log a - log b = log(a/b)..got it?

Answer 14

Alright, so far so good.

Answer 15

So your problem becomes..

Answer 16

That's what your problem becomes

Answer 17

I would probably be able to solve it on a calculator but I just don't know where to find x on the calculator....lol

Answer 18

No. I don't recommend that. This is straight forward.

Answer 19

alright alright i feel u. keep on keepin on then

Answer 20

Now we see that the logarithm has no obvious base... but by convention we take the base to be 10. Then using another rule we transform from logarithmic to exponential form.

Answer 21

Get it?

Answer 22

Yessir

Answer 23

So can you solve for x?

Answer 24

What are your options as far as choices go?

Answer 25

I get x as approximately 5 10^-3 or .005

Answer 26

I was using what @vt linked to. X= 5/999 approx 5/1000 or .005 or 5 10^-3

Answer 27

Excuse me @Isaiah.Feynman linked to.(not vt)

Answer 28

5/999?

Answer 29

.005 yep yep :) thanks everyone!