- #1
Bashyboy
- 1,421
- 5
Differential Equations--Finding Constants
I uploaded a pdf document, which contains the problem I am currently working on, namely, problem number 7
I am having particular difficulty with this portion of the solution:
"(ii) At y=3, the function ay+b changes from positive to negative
--> ay+b has a negative slope --> a is negative"
Why does "a" being negative follow from these facts? Also, why does a function change signs at y = 3?
Homework Statement
I uploaded a pdf document, which contains the problem I am currently working on, namely, problem number 7
Homework Equations
The Attempt at a Solution
I am having particular difficulty with this portion of the solution:
"(ii) At y=3, the function ay+b changes from positive to negative
--> ay+b has a negative slope --> a is negative"
Why does "a" being negative follow from these facts? Also, why does a function change signs at y = 3?
Attachments
Last edited: