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Mathematics 20 Online
OpenStudy (anonymous):

please help meeeeeeeee

OpenStudy (anonymous):

hi

OpenStudy (anonymous):

find the exact value of the logarithm

OpenStudy (anonymous):

log base5 (4)+logbase 5(50

OpenStudy (anonymous):

hi can you help me please

OpenStudy (anonymous):

its about logarithm expresion

OpenStudy (anonymous):

cann some one help me pleasee

OpenStudy (anonymous):

here is what i did log(base 5) 4 + log(base5)50 log(4)/log(5)+log(50)/log(5) log(4)+log(50)/log(5) log(4*50)/log(5) log(200)/log(5)

OpenStudy (anonymous):

but i dont know how to continue

OpenStudy (anonymous):

helllllllllpppppp pleasseeeeeeeeeeeeeeeee

OpenStudy (anonymous):

the base are same then just add the 4 and 50 as i remember

OpenStudy (solomonzelman):

You did it wrong, but close log(base 5) 4 + log(base5) 50 = log(base 5)(4 times 50)=log(base 5)(200) as log(base x) y + log(basex) c = log(base x) (y times c)

OpenStudy (anonymous):

and thats it

OpenStudy (solomonzelman):

No, not yet.

OpenStudy (anonymous):

?

OpenStudy (anonymous):

so i multiply 4 times 500

OpenStudy (solomonzelman):

log(base 5)(200) go the other way, don't combine, log(base 5)(200)=log(base 5)(5 times 5 times 8)= log(base 5 ) + 5 log(base 5 ) +log(base 5 ) 8 and log(base 5 ) 5=1

OpenStudy (anonymous):

sorry 50

OpenStudy (solomonzelman):

What 50 ?

OpenStudy (solomonzelman):

look at what I wrote.

OpenStudy (anonymous):

the 50 from the expresion

OpenStudy (anonymous):

ok i dont get it but you say that the answer is 1?

OpenStudy (solomonzelman):

log(base 5) 4 + log(base5) 50 = log(base 5)(4 times 50)=log(base 5)(200) log(base 5)(200)=log(base 5)(5 times 5 times 8)= log(base 5 ) + 5 log(base 5 ) +log(base 5 ) 8 and we know log(base 5 ) 5=1

OpenStudy (solomonzelman):

So 1+1+log(base 5) 8

OpenStudy (solomonzelman):

this equals?

OpenStudy (anonymous):

2log(base5)8

OpenStudy (solomonzelman):

No no no.... 1 + 1 + log(base 5) 8 =? HERE, http://www.1728.org/logrithm.htm to calculate log(base 5) 8

OpenStudy (anonymous):

390625 i dont get that calculator but this is what i did log(base5)8=5^8

OpenStudy (solomonzelman):

on the right box from the "logarithm of" is put 8 and in the right box from the "number base >>>" put the base.

OpenStudy (anonymous):

1.2920296742

OpenStudy (anonymous):

is that it?

OpenStudy (anonymous):

sorry i am not very good in precalculus

OpenStudy (anonymous):

actually i am terrible

OpenStudy (solomonzelman):

you had log(base 5 ) + 5 log(base 5 ) +log(base 5 ) 8 correct?

OpenStudy (anonymous):

Yes that

OpenStudy (solomonzelman):

So, log(base5) 5=1 as any log with same base and log, beside some exceptions, right?

OpenStudy (anonymous):

Yes

OpenStudy (solomonzelman):

so log(base 5 ) + 5 log(base 5 ) +log(base 5 ) 8 turns into 1 + 1 + log(base 5 ) 8 okay?

OpenStudy (anonymous):

Oooooo)

OpenStudy (solomonzelman):

good so far, or no?

OpenStudy (anonymous):

Thankyou yes

OpenStudy (solomonzelman):

1 + 1 + log(base 5 ) 8 2 + log(base 5 ) 8 2 + 0.90308998699 or approximately 2 + 0.9 2.90308998699 or approximately 2.9

OpenStudy (anonymous):

Ok

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