^ -степень
64^n+1 * 3^2n / 4^3n *9^n-2 =
= 4^3n+3 / 4^3n * 3^2n / 3^2n-4 =
=4^3n+3-3n * 3^2n-(2n-4) =
=4^3 * 3^4 = 5184
#1 Неполные квадратные уравнения!
x^2 - 7x = 0
x (x - 7) = 0
x= 0;
x = 7
#2
5x^2 - 3x = 0
x (5x - 3) = 0
x = 0
x = 3/5
#3
9x^2 - x = 0
x (9x - 1) = 0
x = 0
x = 1/9
Y=(x²+1)∧(-1/2), y'=-1/2*(x²+1)^(-3/2)*2x=-x/√(x²+1)³