arcsin(sin257')<span>=-0.610597594 </span>
(2х+1)2=2(х-1)*(2х+3) =4х+2=(2х-3)*(2х+3)=4х+2
б)<span> ℓog2x+3(5x2+11x+3)=2</span>
<span>5x²+11x+3=(2x+3)²</span>
<span>5x²+11x+3=4x²+12x+9</span>
<span>5x²+11x+3-4x²-12x-9=0</span>
<span>x²-x-6=0</span>
<span>D = 1²-4*1*(-6)=1+24=25</span>
<span>x1=(1+5)/2=3</span>
<span>x2=(1-5)/2=-2</span>
Функция y=2x+x³
Производная y'=2+3x²