Question

Pls help...evaluate 10^x when x = lg 5...thank you

Answer 1

Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!

Answer 2

I am assuming it is log base 10

Answer 3

yes...is log base 10

Answer 4

if you have base to the log of that base it cancel

Answer 5

\[x^{\log_{x}b }=b\]

Answer 6

what about if x = lg (lg 5)?

Answer 7

still base 10?

Answer 8

yes

Answer 9

You could just evaulate it using calculator

Answer 10

gotta show workings

Answer 11

5

Answer 12

10^log[5]=ans
log[10^log[5]]=log[ans]
log[5]log[10]=log[ans]
log[10]=1
log[5]=log[ans]

get rid of log
5=answer

Answer 13

i understood now but what about if x = lg (lg 5)?

Answer 14

10^x=log[5]

Answer 15

10^((10)^x)=5

Answer 16

then use x=logy, where y=log5
10^x=y=log5

Answer 17

did u get that kwoky

Answer 18

im still trying to figure out ...

Answer 19

ok, w/c one? the latter or the first q?

Answer 20

the latter...cos i don't understand how can both answers turn out to be 5

Answer 21

evaluate 10^x when x = log5
10^x=10^log5
= 5

Answer 22

This one I understood but when x = log ( log 5), I don't quite understand.

Answer 23

x = log ( log 5)
then use x= log ( y ), where y=log5
10^x=10^logy
=y =log5

Answer 24

understood better?

Answer 25

my pc kept hanging up/...lol

Answer 26

erm....I think I'm quite dumb with log...still confused. I still think that with 10^lg ( lg 5), the 10^lg will be cancelled thus the ans should be lg 5 instead of 5.

Answer 27

10^logy = y

Answer 28

but since there is two log..thus shouldn't the 1st log be written off with the 10, therefore answer should left with 2nd log?

Answer 29

therefore 10^log(log5)
=log5

Answer 30

yup...ans should be log 5 then.

Answer 31

10^log(M)
=M
10^log555
=555

Answer 32

ok...thanks mark !

Answer 33

ok wc kworky..good luck post some more q. so that you can practice solving them