x Turn on thread page Beta
 You are Here: Home >< Maths

Asymptotes & Translating Reciprocal Graphs watch

1. Q1. When sketching reciprocal graphs, is plugging in x values to find y compulsory because I've seen a few tutorials where people just draw it without actually finding the y values.

Q2. How do you find the Asymptotes of a reciprocal graph?
2. (Original post by FamilyFirst)
Q1. When sketching reciprocal graphs, is plugging in x values to find y compulsory because I've seen a few tutorials where people just draw it without actually finding the y values.

Q2. How do you find the Asymptotes of a reciprocal graph?
A1. Not unless the question states you must do so.

A2. say we have F(x)=f(x)/g(x) where f/g cannot be simplified, then the vertical asymptotes will appear when g(x)=0 , the horizontal asypmtotes will appear when we divide through by the highest power of x in F(x) then take the limit as x->infinity
3. Ohh, makes a bit of sense. Thank you, I'll attempt some questions now.
4. 1: no sketching is just drawn it as basic, normally you should show important points but a question should state it.

2: an asymptote is where a graph goes off to infinity or the function cannot work properly. A reciprocal is 1/f(X) e.g. 1/sinx. When f(X) is 0 the value would be infinity or n/a so these points are where the asymptotes are e.g. Sinx = 0 at 0, 180, 360 degrees etc.

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: October 23, 2015
Today on TSR

Loughborough better than Cambridge

Loughborough at number one

Poll
Useful resources

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

How to use LaTex

Writing equations the easy way

Study habits of A* students

Top tips from students who have already aced their exams

Chat with other maths applicants