Maths MEI C3 questionWatch

Announcements
#1
Hi,

I'm not really sure where to start..?

Cheers for any help, it really is appreciated :')

Posted from TSR Mobile
0
#2
P.s. I am finding the process of inverting the function quite difficult.

Is there an easy trick which I have forgotten?

Posted from TSR Mobile
0
4 years ago
#3
(Original post by ThatWasHard!)
P.s. I am finding the process of inverting the function quite difficult.

Is there an easy trick which I have forgotten?
You do not need to invert the function

0
#4
(Original post by TenOfThem)
You do not need to invert the function

They're reciprocals of each other. But I need the inverse function don't I?

Posted from TSR Mobile
0
#5
(Original post by TenOfThem)
You do not need to invert the function

Am I supposed to find the reciprocal then integrate?

Posted from TSR Mobile
0
4 years ago
#6
(Original post by ThatWasHard!)
Am I supposed to find the reciprocal then integrate?

Posted from TSR Mobile
I know now, I just said something stupid before lol!

To find the inverse of this function, we would make x the subject, so we'd have x=f(y) [but usually we just change the variable and have y=f^-1(x)]

The gradient of the inverse function is therefore dx/dy

First order differentials behave like fractions so we can say:
dy/dx * dx/dy = 1

So dx/dy = 1 / (dy/dx)
0
4 years ago
#7
(Original post by ThatWasHard!)
Am I supposed to find the reciprocal then integrate?

Posted from TSR Mobile
It would be pretty hard to find the inverse function of that! Lol don't integrate or do the reciprocal of the function! Lol
0
#8
(Original post by Chazatthekeys)
It would be pretty hard to find the inverse function of that! Lol don't integrate or do the reciprocal of the function! Lol
Aah I get it! Cheers so much! :')

Posted from TSR Mobile
0
4 years ago
#9
(Original post by ThatWasHard!)
Aah I get it! Cheers so much! :')

Posted from TSR Mobile
No worries! aha, what paper is this?! I couldn't find it lol
0
4 years ago
#10
(Original post by ThatWasHard!)
Aah I get it! Cheers so much! :')

Posted from TSR Mobile
Sorry - I went out - Luckily Chaz was on hand
1
#11
(Original post by Chazatthekeys)
No worries! aha, what paper is this?! I couldn't find it lol
It was from the C3 textbook

Posted from TSR Mobile
0
4 years ago
#12
(Original post by ThatWasHard!)
It was from the C3 textbook

Posted from TSR Mobile
Ah right okay, I went through all the papers to find it lol
0
X

new posts
Latest
My Feed

Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

University open days

• Manchester Metropolitan University
Wed, 19 Jun '19
• University of West London
Wed, 19 Jun '19
• University of Warwick
Fri, 21 Jun '19

Poll

Join the discussion

How did your AQA A-level Biology Paper 3 go?

Loved the paper - Feeling positive (337)
15.64%
The paper was reasonable (1172)
54.39%
Not feeling great about that exam... (466)
21.62%
It was TERRIBLE (180)
8.35%

View All
Latest
My Feed

Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.