1) Заменяем m на 5:(5^2 - 25) / 3 2 = (25 - 10) / 6 = 15 / 6 = 2.5
2) Найдем корни уравнения 3x^2 - 7x + 4 = 0:D = (-7)^2 - 434 = 49 - 48 = 1x1 = (7 + √1) / 6 = 1x2 = (7 - √1) / 6 = 2/3Меньший корень: x2 = 2/3
3) Упрощаем выражение:3/(4m^-2n^4) 8m^3n^-2 = 3 / (4/m^2 n^4) 8m^3 1/(n^2) = 3 / (4/m^2 n^4) 8m^3 1/(n^2)= 3 (m^2/4) (1/n^4) 8m^3 (1/n^2) = 3 (2m^2/4) (m^3 / n^4 n^2)= 3 (m^2/2) m^3 / n^6 = 3 * (m^5 / 2) / n^6= 3m^5 / 2n^6
1) Заменяем m на 5:
(5^2 - 25) / 3 2 = (25 - 10) / 6 = 15 / 6 = 2.5
2) Найдем корни уравнения 3x^2 - 7x + 4 = 0:
D = (-7)^2 - 434 = 49 - 48 = 1
x1 = (7 + √1) / 6 = 1
x2 = (7 - √1) / 6 = 2/3
Меньший корень: x2 = 2/3
3) Упрощаем выражение:
3/(4m^-2n^4) 8m^3n^-2 = 3 / (4/m^2 n^4) 8m^3 1/(n^2) = 3 / (4/m^2 n^4) 8m^3 1/(n^2)
= 3 (m^2/4) (1/n^4) 8m^3 (1/n^2) = 3 (2m^2/4) (m^3 / n^4 n^2)
= 3 (m^2/2) m^3 / n^6 = 3 * (m^5 / 2) / n^6
= 3m^5 / 2n^6