А) y' = 6x² + 3Cosx + 2/3*x^-1/3= 6x² + 3Cosx + 2/(3∛x)
б) y' = e^Cosx * (Cosx)' = -Sinx *e^Cosx
<span>100% - начальная</span>
<span>1.
</span>100+р
<span>2.
</span>50+р
<span>3.
</span>(50+р)*2=100+2р
<span>4.
</span>100+2р-р=93,75
р=6,25
{x+y=12⇒y=12-x
{x²/y+y²/x=18⇒x³+y³=18xy⇒(x+y)(x²-xy+y²)=18⇒12(x²-xy+y²)=18xy
2(x²-xy+y²)=3xy
2(x²-x(12-x)+(12-x)²)=3x(12-x)
2(x²-12x+x²+144-24x+x²)=3x(12-x)
6x²-72x+288-36x+3x²=0
9x²-108x+288=0
x²-12x+32=0
x1+x2=12 U x1*x2=32
x1=4⇒y1=8
x2=8⇒y2=4
(4;8);(8;4)
4/7=0,57142857....=0,(571428)
57/15=0,4666...=0,4(6)