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Edexcel Core 3 - 21st June 2016 AM

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hi for question 4b i need help for the range. So far ive subbed 0 into it to get g(x)<= 3

but i dont understand how the other value is calculated

What's the horizontal asymptote?

Reply 61

imran_

Original post by Zacken

What's the horizontal asymptote?

it tends to 0

Reply 62

Zacken

Original post by imran_

it tends to 0

Uh, no it doesn't, have a think about it.

Reply 63

imran_

Original post by Zacken

Uh, no it doesn't, have a think about it.

it tends to infinity

Reply 64

Zacken

Original post by imran_

it tends to infinity

Are you even bothering or just making random guesses?

Reply 65

Zacken

Original post by imran_

it tends to infinity

Substitute in a really large value of

x

, what number do you get close to?

Reply 66

imran_

Original post by Zacken

Are you even bothering or just making random guesses?

from what I can see, the asymptote is going towards the x axis. Theres a reason why I asked for help on this question as i have limited understanding

Reply 67

Student403

Original post by imran_

from what I can see, the asymptote is going towards the x axis. Theres a reason why I asked for help on this question as i have limited understanding

Don't do it by observation. Do his method as he said above

Reply 68

Zacken

Original post by imran_

from what I can see, the asymptote is going towards the x axis. Theres a reason why I asked for help on this question as i have limited understanding

Sub in a really large value of

x

, what number do you get close to?

Reply 69

imran_

Original post by Zacken

Substitute in a really large value of

x

, what number do you get close to?

gets closer to 0.5, is this the actual method to use? or is there an alternative approach

Reply 70

Zacken

Original post by imran_

gets closer to 0.5, is this the actual method to use? or is there an alternative approach

The alternative method to use is

\displaystyle \lim_{x \to \infty} \frac{x+9}{2x+3} = \lim_{x\to \infty} \frac{1 + \frac{9}{x}}{2 + \frac{3}{x}} = \frac{1}{2}

Reply 71

TeeEm

http://www.thestudentroom.co.uk/showthread.php?t=3361867

Reply 72

boyyo

Original post by TeeEm

http://www.thestudentroom.co.uk/showthread.php?t=3361867

what does iygb stand for

Reply 73

Kevin De Bruyne

Original post by boyyo

what does iygb stand for

Original post by TeeEm

http://www.thestudentroom.co.uk/showthread.php?t=3361867

My guess is 'if you're (a) gonad buster'? (I know it's buster gonad, but still :redface:

)

(edited 7 years ago)

Reply 74

math42

Original post by SeanFM

My guess is 'if you're (a) gonad buster'? (I know it's buster gonad, but still :redface:

)

if you got...brains? :tongue:

Reply 75

Kevin De Bruyne

Original post by 1 8 13 20 42

if you got...brains? :tongue:

I fancy your suggestion better than mine :tongue:

Reply 76

boyyo

Original post by SeanFM

My guess is 'if you're (a) gonad buster'? (I know it's buster gonad, but still :redface:

)

Original post by 1 8 13 20 42

if you got...brains? :tongue:

LOL yh I think that makes more sense

Reply 77

ben_urwinator

How hard are the AEA meant to be compared to the c3/c4 exams?

Posted from TSR Mobile

Reply 78

Euclidean

Original post by ben_urwinator

How hard are the AEA meant to be compared to the c3/c4 exams?

Posted from TSR Mobile

Quite a bit more difficult

Reply 79

Clovers

Can anyone please explain why the square root of e^-2x is e^-x Thanks :smile:

Posted from TSR Mobile

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Edexcel Core 3 - 21st June 2016 AM

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