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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
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1.9.32 Solve first order differential equations (A-level only) Flashcards
20 flashcards on OCR (MEI) A Level Maths 1.9.32 Solve first order differential equations (A-level only): the key formulae, methods and definitions you need to recall for Component 01, Component 02 and Component 03.