3(х-1)=8
3х-3=8
3х=11
х=11/3
<span>у= х^2 - 5x + 1/х
(U+V)`=U`+V`
(U-V)`=U`-V`
<span>y`= (х^2)` - (5x)`+(1/x)`=2x-1+(-1)=2x-2</span></span>
2. 472:2. 4=1. 03
-1. 3-1. 03=0. 27
0. 27:0. 6=0. 45:0. 9=0. 5
<span>1) 49-9b²
</span>
<span>2) 16a²-8ab+b²=
</span>
3) x²-10x+25=
<span>4)m³+n³=
</span>
<span>5)c³-27=
</span>
<span>6) y³+3y²x+3yx²+x³=
</span>
<span>7) c³-6c²+12c-8=
</span>
1) ((П-arccos 1/2)-arcsin1/2)^2=((П-П/3)-П/6)^2=(2П/3-П/6)^2=(П/2)^2=П^2/4