F(x0)=6,f(∆x)=2.8
f(x0)=-4,f(∆x)=-4.6
a^2(c^2-9)+4(c^2-9)= (c^2-9)(a^2+4)
6.12/17-3.9/17+8.14/17=3.3/17+8.14/17=11.17/17=12
Ответ:
Угол bca=180-134=46
Угол ABC =90
Угол cab =180-(180-134+90)=44
<span>Найти множество значений функции y = cos</span>²<span> (x) - sin(x)</span>
Решение
<span>|cosx| ≤ 1</span>
<span> -1 ≤ cosx ≤ 1,
0 ≤ cos</span>²<span>(x) ≤ 1
</span><span>|sin x| ≤ 1
</span><span>-1 ≤ sinx ≤ 1,
</span><span>-1 ≤ -sinx ≤ 1,
</span><span>0 -1 ≤ <span>Cos</span></span>²<span><span>x – sinx </span>≤ 1+ 1
</span><span>-1 ≤ <span>Cos2x – sinx </span>≤ 2</span>
<span>Ответ: [- 1 ; 2].</span>