0,0625 = 625/10000 = 125/2000 = 25/400 = 5/80 = 1/16
16 = 4*4
√(1/16) = √(1/(4*4)) = 1/4 = 0,25
X⁴ + x² - 2 = 0
Сделаем замену x² = m ≥ 0
m² + m - 2 = 0
D = 1² - 4 * 1 * (- 2) = 1 + 8 = 9 = 3²
![m _{1} = \frac{-1+3}{2} =1\\\\m _{2}= \frac{-1-3}{2}=-2](https://tex.z-dn.net/?f=m+_%7B1%7D+%3D+%5Cfrac%7B-1%2B3%7D%7B2%7D+%3D1%5C%5C%5C%5Cm+_%7B2%7D%3D+%5Cfrac%7B-1-3%7D%7B2%7D%3D-2++)
- неуд.
x² = 1
x₁ = 1 x₂ = - 1
Ответ: - 1 ; 1
<span>√7+ √8= 5.474
</span>√3+ √6=4.181
дано; (an)-ариф прогр. a1=6.3 d=2.5
найти: S12
s12=(12.6+2.5*(12-1))/2 *12=240.6 . вроде вот так вот
А) x^2/5y и z-3/y^2 <=> (y*x^2) / 5y^2 и (5z-15) / 5y^2