问题标题:
【100分求一道数学题,AftertyearsthepopulationofacertaintownisP(t)=50+5tthousandpeople.ApopulationPhasanassociatedCO2level,C(P)=(根号下(P2+1))/2.After2years,therateatwhichCO2levelischangingwithrespecttot】
问题描述:
100分求一道数学题,
AftertyearsthepopulationofacertaintownisP(t)=50+5tthousandpeople.ApopulationPhasanassociatedCO2level,C(P)=(根号下(P2+1))/2.After2years,therateatwhichCO2levelischangingwithrespecttotwillbe:答案是150/根号下3601实在闹不明白为什么,
C(P)=(根号下(P2+1))/2.P后面的2表示P的平方
孙娟萍回答:
P(t)=50+5tC(p)=(根号下(P2+1))/2.求的是变化率C(p)=[根号下(50+5t)²+1]/2=[根号下(2501+500t+25t²)]/2dC/dt=(500+50t)/{4[根号下(2501+500t+25t²)]}当t=2的时候dC/dt=(500+100)...
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