У= -5х+20
у= -5х=20
у=20: (-5)
у=-4
(Х^3/2 + Y^3/2):(X-X^1/2 * Y^1/2 + Y)=((X^1/2)³+(Y^1/2)³):<span>(X-X^1/2 * Y^1/2 + Y)=
(X^1/2+Y^1/2)(</span>X-X^1/2 * Y^1/2 + Y):(X-X^1/2 * Y^1/2 + Y)=<span>X^1/2+Y^1/2</span>
<span>6х-6у = (-6y+6x)=-6(y-x)
ответы а) и б) подходят</span>
{a7=a1+6d; {a1+6d=-5; {a1+6d=-5; {a1=-5-6*3; {a1=-23
{a32=a1+31d; {a1+31d=70; { 25d=75; { d=3 {d=3