Π/3-π/6=π/6
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П/36
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- 3x + 4 = 2x - 1
- 3x - 2x = - 4 - 1
- 5x = - 5
x = 1
y = 2*1 - 1 = 2 - 1 = 1
Ответ
(1; 1)
4 - lg ^2(x) =3 * lg(х)
пусть lg(х) = y
4 - y^2 = 3y
y^2 + 3y - 4 = 0
По теореме Виетта: y1 + y2 = -3 и y1 * y2 = -4
y1 = 1 или y2 = -4 =>
lg(х) = 1 или lg(х) = -4 =>
<span>x = 10 или x = 10^(-4) = 0.0001</span>
2а(4а+х)-(4а+х)=(4а+х)(2а-1)