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指数增长与衰减模型（dy/dt = ky）练习
指数增长与衰减模型（dy/dt = ky） · 1–12
用 y = y₀e^(kt)，结果精确到百分位。
1.dydt = −0.03y, y(0) = 480y(4) ≈
2.dydt = −0.05y, y(0) = 430y(8) ≈
3.dydt = −0.15y, y(0) = 130y(10) ≈
4.dydt = −0.12y, y(0) = 490y(7) ≈
5.dydt = −0.06y, y(0) = 420y(4) ≈
6.dydt = −0.15y, y(0) = 20y(3) ≈
7.dydt = −0.15y, y(0) = 430y(4) ≈
8.dydt = −0.15y, y(0) = 130y(9) ≈
9.dydt = −0.06y, y(0) = 410y(5) ≈
10.dydt = −0.07y, y(0) = 70y(7) ≈
11.dydt = −0.09y, y(0) = 90y(8) ≈
12.dydt = −0.08y, y(0) = 440y(3) ≈
答案 — 指数增长与衰减模型（dy/dt = ky）练习
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