2*sqrt(2)-4cos4x=0
2(sqrt(2)-2cos4x)=0
Sqrt(2)-2cos4x=0
Cos4x=1/sqrt(2)
4x=pi/4+2pin, n€Z or 4x=7pi/4+2pim, m€Z
X=pi/16+(pin)/2, n€z or x=7pi/16 + (pim)/2, m€Z
Надеюсь, понятно.
<span>6у+2=у-3
</span><span>6у-у=-2-3
</span>5у=-5
у=-5:5
у=-1
Корень4-6х-х^2=х+4
(корень4-6х-х^2)^2=(х+4)^2
4-6х-х^2=х^2+8х+16
4-6х-х^2-х^2-8х-16=0
-6х-8х+4-16=0
-14х-12=0
х=12/14
х=6/7
1) 3⁶ +3⁶ +3⁶=3*3⁶=3¹⁺⁶ =3⁷
2) 2*2³ =2¹⁺³ =2⁴
3) 3*3⁴ =3¹⁺⁴ =3⁵