X^3+6x^2+11x+6=0
x^3+x^2+5x^2+5x+6x+6=0
x^2(x+1)+5x(x+1)+6(x+1)=0
(x+1)(x^2+5x+6)=0
(x+1)(x^2+2x+3x+6)=0
(x+1)(x(x+2)+3(x+2))=0
(x+1)(x+2)(x+3)=0
x=-1
x=-2
x=-3
<em>1) f'(x)=(cos(3/4x - 1))'=-(3/4)sin(3/4x - 1)</em>
<em>2) f'(x)=(sin(x/4 - 7))'=(1/4)cos(x/4 - 7)</em>
<em>3) f'(x)= (cos(0,8x - 3))'=-0.8sin(0.8x - 3)</em>
<em>4) f'(x)= (x² + x³ + eˣ -4)'=2x+3x²+eˣ</em>
<em>5) f'(x)= (2ˣ + eˣ - sinx)'=2ˣ㏑2+eˣ-cosx</em>
<em>6) f'(x) = (9x² - cosx)'=18x+sinx</em>
(x+2)²=(x+3)²
x²+4x+4=x²+6x+9
x²+4x-x²-6x=9-4
-2x=5
x=-2,5
2x+x-7x+3=8
2x+x-7x=8-3
-4x=5
4x=-5
x=-5/4=-1.25
Ответ: -1.25
Vt=(v-16)t/2+96t/2;
v=v/2-8+48;
v=v/2+40;
v/2=40;
v=80;
<em>Ответ: v=80км/ч.</em>