1.Do you like listening to music ? No, I don't like listening to music
2. Has he got a clever god ? No, he hasn't got a clever dog
3.Do they can ride a bike ? No, they can't ride a bike
4.Is she swimming now ? No, she isn't swimming now
5.Does Tom never read magazines ? No, Tom doesn't never read magazines
Скачай на телефон калькулятор Photomath, он решит и 3 и 4(на множетели он точно разложит!
x²(x-1)²+x(x²-1)=2(x+1)²
x²(x²-2x+1)+x(x²-1)=2(x²+2x+1)
x⁴-2x³+x²+x³-x=2x²+4x+2
x⁴-x³-x²-5x-2=0
x⁴+x³-2x³-x²-2x²+2x²-x-4x-2=0
x²(x²-2x-1)+x(x²-2x-1)+2(x²-2x-1)=0
(x²+x+2)(x²-2x-1)=0
x²+x+2=0
D<0, нет корней
x²-2x-1=0
D= 4+4=8
x1= (2+√8)/2= (2+2√2)/2= 1+√2
x2= (2-2√2)/2= 1-√2
2b(3a+b)-(a-b)b=6ab+2b²-ab+b²=3b²+5ab
Функция f(x) имеет в точке x = log_{81}5, минимум.
При x -> +∞, f(x) - > +∞, при x -> -∞, f(x) - > +∞
Mножество значений функции f(x):