А) (х+у)^2
б)х^2+y^2
)a^3+b^3
)(a-b)^3
)a^3-b^3
)(a+b)^3
(1/3) ^ -1 = 3
(-6/7) ^ 0 = 1
(1/2) ^ 2 = 4
3 - 1 + 4/2 = 2+2=4
Ответ : 4
Cost = 3/4 cos(t/2) = ((1 + cost)/2)^(1/2) = ((1 + 3/4)/2)^(1/2) = (7/8)^(1/2) = (7^(1/2))/(2*(2^(1/2))) sin(t/2) = (1 - cos^2(t/2))^(1/2) = (1 - 7/8)^(1/2) = 1/(8^(1/2)) = 1/(2*(2^(1/2))) tg(t/2) = sin(t/2)/cos(t/2) = (1/(2*(2^(1/2))))/((7^(1/2))/(2*(2^(1/2)))) = 1/(7^(1/2)) ctg(t/2) = 1/tg(t/2) = 7^(1/2)<span> </span>
=2 в степени 10 * 3 в степени 10= 6 в степени 10
4. 4 треугольника по 3 спички. Прости за прошлый ответ.