Don't know the first thing about this one: 24=e^(x+1)

[SyrenaV]

Fixed the math problem. Now it should make sense.

Yeah. I haven't got the first clue as to what I'm supposed to with this, and it's part of my AP Calculus summer work. The part that's getting me is the e (not sure if it's the actual number like in a natural log or what), and the function in the exponent. Any suggestions?

24=e^x+1

 

[royhaas]

What is the question?

 

[SyrenaV]

OH! Sorry.

I got my keyboarding wrong both times. It's SUPPOSED to say 24=e^x-1. Oops.....

 

[stapel]

I got my keyboarding wrong both times. It's SUPPOSED to say 24=e^x-1. Oops.....

Okay, so the equation is "24 = e^x - 1". But what are the instructions? What are you supposed to do with this equation?

Please be specific, showing all of your work so far. Thank you!

Eliz.

P.S. To learn about the natural exponential "e", try reading some of the lessons available online. :wink:

 

[SyrenaV]

Okay, I really shouldn't have made this topic at ten thirty after trying for hours to get this problem...

The equation reads: 24 = e^x-1. My job is to solve for x.

I'm pretty sure I'm just having letter overload, but I think I'm supposed to get the ln of 24 and then set that equal to (x-1). (It's been a while since I've done this (like, maybe two years), so I really need to refresh my brain on logs and exponentials.)

ln(24)=x-1

After I get the ln of 24, do I add 1 to get x by itself?

 

[stapel]

After I get the ln of 24, do I add 1 to get x by itself?

Yes, though the expected answer is probably "ln(24) + 1", not the decimal approximation. :wink:

Eliz.

 

[SyrenaV]

After I get the ln of 24, do I add 1 to get x by itself?

Yes, though the expected answer is probably "ln(24) + 1", not the decimal approximation. :wink:

Eliz.

Thank you! :mrgreen: This was one of those things that I know, but it's so far back in my subconscious, I can't ever get to it without forcing my brain out of its usual state. I was terrified of showing up in AP Calculus with NO IDEA what I was doing.