(sin(x))^3 - sin(x) - cos(x) = 0
sin(x) * ((sin(x))^2 - 1) - cos(x) = 0
sin(x) * ((1 - (cos(x))^2) - 1) - cos(x) = 0
sin(x) * (cos(x))^2 + cos(x) = 0
cos(x) * (sin(x) * cos(x) + 1) = 0
sin(x) * cos(x) = -1
0.5 * sin(2*x) = -1
sin(2*x) = -2
решения нет
остается:
<span>cos(x) = 0</span>
45.9*10¹¹ cm²=4.59*10⁸ m²=4.59*10² km²=459 km²
А) y'=5*(1/x)'=5*(-1/x^2)=-5/x^2
б) y'=(3-5x)'=0-5=-5
в) y'=8*(sqrt(x))'=8*(1/2*sqrt(x))=4/sqrt(x)
г) y'=6*x^(6-1)=6*x^5
д) y'=2'=0
a² + 2ab + b² = (a + b)²
x² + bx + ? = полный квадрат
bx = 2*x*√?
√? = bx/2x = b/2
? = b²/4
полный квадрат x² + bx + b²/4 = (x + b/2)²