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September 14, 2025, 04:48:45 am
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Author Topic: Help! Maths help (please answer before today - this morning!)  (Read 1361 times)  Share 

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gmx

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Help! Maths help (please answer before today - this morning!)
« on: March 23, 2010, 01:25:27 am »
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    Find the values of b and B if the general equation of the graph shown is y = (e^(x + b)) + B. Give your answers correct to 2 decimal places.

I was not able to use simultaneous equations to solve this:  

I ended up with: e^(1+b) +e^b = -4

From there, factorizing was no good....

Can you show me the steps through this?

The graph is in my picture now
« Last Edit: March 24, 2010, 12:25:57 am by gmx »
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moekamo

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Re: maths quest question
« Reply #1 on: March 23, 2010, 04:49:25 am »
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huh? what graph???

anyway with that equation:



which is not possible as e^b is always greater than 0...can you provide the points the graph gives, you may have made a mistake in previous working...
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Blakhitman

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Re: Help! Maths help (please answer before today - this morning!)
« Reply #2 on: March 24, 2010, 05:59:53 pm »
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Then factorise...



then rearrange using magic or the way you've been taught to get



Then use calculator (as question asks for decimal places) and you should get b=0.84, then just sub into either 1st or 2nd equation to obtain the value of B!
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Blakhitman

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Re: Help! Maths help (please answer before today - this morning!)
« Reply #3 on: March 24, 2010, 06:34:14 pm »
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I don't get it lol, why is it too late?
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the.watchman

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Re: Help! Maths help (please answer before today - this morning!)
« Reply #4 on: March 24, 2010, 06:35:48 pm »
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Quote from: Blakhitman on March 24, 2010, 06:34:14 pm
I don't get it lol, why is it too late?

Quote
Re: Help! Maths help (please answer before today - this morning!)
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Blakhitman

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Re: Help! Maths help (please answer before today - this morning!)
« Reply #5 on: March 24, 2010, 06:38:08 pm »
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lol owell, might help someone else ><
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the.watchman

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Re: Help! Maths help (please answer before today - this morning!)
« Reply #6 on: March 24, 2010, 06:38:55 pm »
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Quote from: Blakhitman on March 24, 2010, 06:38:08 pm
lol owell, might help someone else ><

Lol, i would have done it, but i was too late as well :P
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TrueTears

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Re: Help! Maths help (please answer before today - this morning!)
« Reply #7 on: March 24, 2010, 06:40:27 pm »
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Quote from: Blakhitman on March 24, 2010, 06:38:08 pm
lol owell, might help someone else ><
yeh it helped me heaps, thanks man!!
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Blakhitman

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Re: Help! Maths help (please answer before today - this morning!)
« Reply #8 on: March 24, 2010, 06:52:40 pm »
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Quote from: the.watchman on March 24, 2010, 06:38:55 pm
Quote from: Blakhitman on March 24, 2010, 06:38:08 pm
lol owell, might help someone else ><

Lol, i would have done it, but i was too late as well :P

Prove it :p this stuff is too hard for you man :p

Quote from: TrueTears on March 24, 2010, 06:40:27 pm
Quote from: Blakhitman on March 24, 2010, 06:38:08 pm
lol owell, might help someone else ><
yeh it helped me heaps, thanks man!!

Anytime, I like helping those who aren't mathematically inclined, so if you ever need help TT Pm me...
:)
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TrueTears

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Re: Help! Maths help (please answer before today - this morning!)
« Reply #9 on: March 24, 2010, 06:57:13 pm »
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thanx man, I owe u heaps!
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Blakhitman

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Re: Help! Maths help (please answer before today - this morning!)
« Reply #10 on: March 24, 2010, 06:59:06 pm »
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Like I said man, I do it out of passion, so you don't owe me anything!
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the.watchman

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Re: Help! Maths help (please answer before today - this morning!)
« Reply #11 on: March 24, 2010, 07:05:45 pm »
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Quote from: Blakhitman on March 24, 2010, 06:52:40 pm
Quote from: the.watchman on March 24, 2010, 06:38:55 pm
Quote from: Blakhitman on March 24, 2010, 06:38:08 pm
lol owell, might help someone else ><

Lol, i would have done it, but i was too late as well :P

Prove it :p this stuff is too hard for you man :p

Haha, ok maybe it was too difficult... ;)
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Remember, remember the 5th of November

2010 - MM CAS (47) - Cisco 1+2 (pass :P)
2011 - Eng - Phys - Chem - Spesh - Latin - UMAT
ATAR - 99.00+ plz... :)

Feel free to PM me for anything :D

Blakhitman

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Re: Help! Maths help (please answer before today - this morning!)
« Reply #12 on: March 24, 2010, 09:24:19 pm »
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You're welcome!

hey the.watchman....nerrrr
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the.watchman

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Re: Help! Maths help (please answer before today - this morning!)
« Reply #13 on: March 24, 2010, 10:54:21 pm »
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Quote from: Blakhitman on March 24, 2010, 09:24:19 pm
You're welcome!

hey the.watchman....nerrrr

>.<
Meanie :(
I'm a maths failure!
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Remember, remember the 5th of November

2010 - MM CAS (47) - Cisco 1+2 (pass :P)
2011 - Eng - Phys - Chem - Spesh - Latin - UMAT
ATAR - 99.00+ plz... :)

Feel free to PM me for anything :D
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