((a+b)-(a-b))*((a+b)+(a-b))*(1/a+1/b) = (a+b-a+b)*(a+b+a-b)*(1/a+1/b) = 2a*2b*(a+b)/ab = 4a+4b = 4(a+b)
209999 210000 эти два числа
16/16 -16 уток
9/16- 9 улетело
7/16- 7 в камышах
Y'=(-1/sin²x⁴)*(x⁴)'=-4x³/sin²x⁴
<span>х+(90+30)=180
x + 120 = 180
x = 180 - 120
x = 60
60 + (90 + 30) = 180
180 = 180
(x + 90) + 30 = 180
x = 180 - 90 - 30
x = 60
(60 + 90) + 30 = 180
180 = 180
(x + 60) *5 = 500
5x + 300 = 500
5x = 500 - 300
5x = 200
x = 200 : 5
x = 40
(40 + 60) * 5 = 500
500 = 500
5*x + 300 = 500
5x + 300 = 500
5x = 500 - 300
5x = 200
x = 200 :5
x = 40
5 * 40 + 300 = 500
500=500</span>