Question

Hi everyone.I need help about logarithmic functions..

find x without using a table
log sub10 x

Answer 1

log(x) = y

Answer 2

what is it you are needing with the helping?

Answer 3

how to find x without using a table

Answer 4

x is an independant variable; there is nothing to find;

Answer 5

x = 3, x = 12, x = 16543463, x = .34, x = nothing 0 and below

Answer 6

ah sorry the given is lacking

Answer 7

log sub10 x=2

Answer 8

ahh lol

in other words, logs point to exponents;

log10(x) = 2 means: 10^2 = x

Answer 9

\[\log_{10} x=1 .....................means................x=10^{1}\]

Answer 10

or do you mean; what does log10(2) = ?

then 10^? = 2

Answer 11

\[\log_{10} x=2\]

Answer 12

and for the record: "log" by itself means; log(base 10)

Answer 13

log(x) = 2

Answer 14

then 10^2 = x;

x = 10*10

x = 100

Answer 15

amistre64 what if the base is not 10....

Answer 16

if it aint base 10 then we sullpy the base.

say base 7

log7(x) = 2

7^2 = x

49 = x

Answer 17

logs point to exponents; they are inverses of each other

Answer 18

what if the given is like this lnx=ln2+ln3+ln

Answer 19

\[log_7(x)=2\]
\[7^{log_7(x)}=7^2\]
\[x = 7^2\]
\[x = 49\]

Answer 20

lna + lnb = ln(ab)

Answer 21

can you explain further

Answer 22

\[ln(x)=ln1+ln2+ln3+...+lnk\]
\[e^{ln(x)}=e^{ln1+ln2+ln3+...+lnk}\]
\[x=e^{ln1}e^{ln2}e^{ln3}...e^{lnk}\]
\[x=1*2*3*...*k\]

Answer 23

which ironically is: x = k!

Answer 24

what do you mean is equal to k? do we multiply it?

Answer 25

k is some arbitrary integer that we can count to; its real value is whatever number you stop at on the positive side of the number line

Answer 26

the answer in our book is 30.so it is just multiplied

Answer 27

but to be fair, k can be any real number greater than 0 and it still amounts to the multiplication of all the stuff

Answer 28

its just multiply the ln(innards) for that problem then yes

Answer 29

ln(x) = ln(3) + ln(5) + ln(17)

x = 3*5*17

Answer 30

what if the given is like this 3 ln 2-ln 6+2 ln 3

Answer 31

- means divide in log talk

Answer 32

3 ln(2) would amount to ln(2^3)

so just read it from left to right

x = 2^3 / 6 * 3^2 ... and follow it in that order

Answer 33

ah so the whole number before the ln becomes an exponent?did get I it right?

Answer 34

ah so the whole number before the ln becomes an exponent?did get I it right?

Answer 35

hey amistre64 are you still there?

Answer 36

yes

Answer 37

since logs are exponents; they act in the same way .... if that makes sense

Answer 38

\[(B^4)^6=B^{4*6}=B^{24}\]

Answer 39

ah so the whole number before the ln becomes an exponent?did get I it right?

Answer 40

what does it mean?i don't understand

Answer 41

\[log_B(4^6)=6\ lob_B(4)\]

Answer 42

typoed it

Answer 43

it means that 3 ln(2) = ln(2^3)

Answer 44

ah so the whole number before the ln becomes an exponent?did get I it right?

Answer 45

ah ok.i understand now.thanks a lot for the help...i'll try to answer another problem then to test if i really got it.thanks again

Answer 46

youre welcome, good luck :)