3.108 http://pl.tinypic.com/r/260s5mo/6

H=r+2m V= 13/3πm³ Wiemy, że V=πr²H Wstawiamy posiadane dane do wzoru 13/3 πm³=πr²(r+2m)/:π 13/3m³=r³+2r²m/*3 13=3r³+6r² -3r³-6r²+13=0/(-1) 3r³+6r²-13=0 W(1)=3+6-13=-4≠0 W(2)=24+24-13≠0 w(-2)=-24+24-13≠0 w(1/2)=3/8+6/4-13≠0