Natali Belska
Гений
(69463)
2 недели назад
1.3√45 - √125 + √80 =
= 3*V(3^2 * 5) - V(5^2 * 5) + V(4^2 * 5) =
= 3*3*V5 - 5*V5 + 4*V5 =
= V5 * (9 - 5 + 4) = 8V5
2.√9/100 + √100/49 =
= V(3^2 / 10^2) + V(10^2 / 7^2) =
= 3/10 + 10/7 =
= 21/70 - 100/70 = - 79/70
3.√4/9+√1/9 = 2/3 + 1/3 = 3/3 = 1
4.√16/81-√169/225 = 4/9 - 13/15 = 20/45 - 39/45 = 19/45
2.√9/100+√100/49
3.√4/9+√1/9
4.√16/81-√169/225