(170-40)-(40-x)=Ln(170-40)/(40-x)这个方程如何解?
问题描述:
(170-40)-(40-x)=Ln(170-40)/(40-x)这个方程如何解?
答
(170-40)-(40-x)=Ln(170-40)/(40-x)
130-(40-x)=Ln130/(40-x)
(40-x)^2-130(40-x)+Ln130=0
40-X=0.03745336311433966922583217306860
X=39.962546636885660330774167826931
51=(170-40)-(40-t)/In(170-40)/(40-t)这个式子有问题.按现在的写法40-t是可以约掉的.