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