1)(t-9)/t, t=10, (10-9)/10=1/10
Otvet: 1/10=0,1
2)a)(x-6)/(x+16)=0, x-6=0, x=6
Otvet: 6
2)b)x+16≠0, x≠-16
Otvet: -16
3) (d²-17d+1)/(4d+9)(4d-9)
(4d+9)(4d-9)≠0, d≠-9/4, d≠9/4
Otvet: -9/4, 9/4
4)25t²+100t+100≠0
25(t²+4t+4)≠0, (t+2)²≠0,t+2≠0,t≠-2
Otvet: -2
5)x²-8x+15≠0
(x-3)(x-5)≠0, x≠3,x≠5
Otvet: 3 , 5