Question

Решите три примера ......................

Answer 1

3. y'=-1+361/x^2

    y''=(-2)*361*x^(-3)

    y(19)<0 max

     у(-19)>0 min

     y(-19)=19-361/(-19)=38

2.

   x=8*0,81/0,18=36

1.

c(f-f0)/(f+f0)<=20

f<=f0(c+20)/(c-20)

f=481*1520/1480=494