A virus is thought to spread through a chicken farm according to the equation N=800/(1+790e^ -0.1t)
, where is the number of infected chickens, is in days.
a.How many chickens are infected at ?
b.Calculate the number of chickens infected after 60 days.
c.How many chickens will become infected eventually? Give reasons for your answer.
ps -0.1t係指數
數學題2.........
2006-11-25 7:25 am
回答 (1)
2006-11-25 6:46 pm
✔ 最佳答案
a. 800nos.b. t=60, 790e^(-0.1t)=1.958 and N=800/(1+1.958)=270.4
that is 271nos.
c. when t increase, e^(-0.1t) tends to zero and N tends to 800
therefore, 800nos. of chicken will be infected eventually
收錄日期: 2021-04-12 19:30:51
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