• anonymous
The exponential decay law dy dt = −λy, λ > 0 may be used to model decay of a radioactive isotope, or any other quantity that is decreasing at a rate proportional to its own magnitude. This is just the exponential growth model with a negative growth rate k = −λ. As is often done, I have put the sign into the differential equation so that the parameter λ is positive. In this question take the unit of time to be years. λ is called the decay rate. (a) By substitution into the differential equation verify that (as expected) y(t) = ce−λt is a solution of the exponential decay law for any constant c.
Mathematics
• Stacey Warren - Expert brainly.com
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SOLVED
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