DF = 8x - 12
FH = x + 3
FH = ½DF
DF = 2FH
FH = 2x + 6
8x - 12 = 2x + 6
8x - 2x = 6 + 12
6x = 18
x = 3
$\sqrt{462}$
dom F(X)=2 X+X^(2)
240÷400
(-27)^(1/3)
81^(1/2)
$2^{23624}$
81^1/2
[matematik]\displaystyle{ \prod_{k=3}^\infty \cos\left(\frac\pi k\right) = 0.1149420448\dots. }[/matematik]
2^(n)(An^2+Bn+C)-4{2^(n-1)[A(n-1)^2+B(n-1)+C]}+4{2^(n-2)[A(n-2)^2+B(n-2)+C]} -(n+1)2^n = 0
