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#1 2012-12-04 06:22:44

gbrad88
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Solve X with e

Solve for x:

ln(x+3)=6

Can you explain to me how the answer is e^(6) -3

Thank you

#2 2012-12-04 06:27:24

anonimnystefy
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Re: Solve X with e

Have you tried doing this:
ln(x+3)=6, so
eln(x+3)=e6

I just raised the number e to both sides, so that we can get rid of the logarithm in the next step.

Can you do it from here?


The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

#3 2012-12-04 06:28:17

gbrad88
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Re: Solve X with e

I did it on a calculator first then tried on my own and became very confused.

#4 2012-12-04 06:36:39

anonimnystefy
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Re: Solve X with e

Hi

Do you understand the step in my post above?


The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

#5 2012-12-04 06:40:15

gbrad88
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Re: Solve X with e

Im sorry, the e concept has me very confused. I feel like Ive wasted a lot of time on these type of examples on my own.

#6 2012-12-04 07:23:25

gbrad88
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Re: Solve X with e

Well let me see again...

That then takes me to the next step of

x+3=e^6

#7 2012-12-04 07:38:22

anonimnystefy
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Re: Solve X with e

Correct! Now you just subtract 3 from both sides and you're done!


The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

#8 2012-12-04 08:38:36

gbrad88
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Re: Solve X with e

x = e^6 -3

THANKS

#9 2012-12-04 20:48:20

anonimnystefy
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Re: Solve X with e

You're welcome.

Welcome to the forum!


The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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