What makes a differential equation first order?
A
Highest derivative is a first derivative, such as dydx\frac{dy}{dx}dxdy; no second or higher derivatives appear.
B
The proportional-growth model dPdt=kP\frac{dP}{dt}=kPdtdP=kP has exponential form P=AektP=\boxed{Ae^{kt}}P=Aekt.
C
y=x3+Cy=x^3+Cy=x3+C
D
y=Aex2/2y=Ae^{x^2/2}y=Aex2/2
1.9.32 Solve first order differential equations (A-level only) Flashcards
Flashcards for OCR (MEI) A Level Maths 1.9.32 Solve first order differential equations (A-level only), covering the key formulae, methods and definitions you need to recall for Component 01, Component 02 and Component 03. 20 cards, matched to the OCR (MEI) A Level Maths (H640) specification. Recall questions account for roughly 50% of marks at A Level Maths, so these target the marks you can secure before the paper starts.