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

C4 - Solving Differentials watch

1. When solving a diffrenential equation such as this one:

I solved it by rearranging it to:

1/75 (dt) = 1/(4-5h) (dh)
but the markscheme solves it with this rearrangment:

1 (dt) = 75/(4-5h) (dh)

My question is, how do I know where the constants go? Why is the '75' with the dh side and why can't I have it on the dt side?
2. (Original post by SirRaza97)
When solving a diffrenential equation such as this one:

I solved it by rearranging it to:

1/75 (dt) = 1/(4-5h) (dh)
but the markscheme solves it with this rearrangment:

1 (dt) = 75/(4-5h) (dh)

My question is, how do I know where the constants go? Why is the '75' with the dh side and why can't I have it on the dt side?
It makes no difference where the constants go. Do it as you please!
3. (Original post by Gregorius)
It makes no difference where the constants go. Do it as you please!
But when I try to find t when h = 0.5 then I get the wrong answer?

EDIT: I figured out why now haha. Thanks for the help anyways

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: May 26, 2016
Today on TSR

Four things top students are doing

Over the Easter break

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