H(-4) + h(5) = 6*(-4) - 4 + 6*5 - 4 = - 24 - 4 + 30 - 4 = - 2
(34+у)²-у²=-408
1156+68у+у²-у²=-408
68у=-408-1156
68у=-1564
у=-1564/68
у=-23
проверка(34+(-23))²-(-23)²=-408
11²-529=-408
121-529=-408
-408=-408
У=ln х-1/х+1y'=1/x+1/(x+1)^2=(x^2+3x+1)/x(x+1)y'=1/x+1/x^2=x^2+x=(1+x)/x^2<span>y'=(2*sqrt(x^2+1)-2x(2x)*(1/2)/sqrt(x^2+1))/(x^2+1)=sqrt(x^2+1)/(x^2+1)^2</span>
(x-a)/(a+3)=(a-4)/(x-a)
(x-a)²=(a+3)(a-4) ⇒
(a+3)(a-4)<0
-∞_____+_____-3_____-_____4_____+_____+∞
a∈(-3;4).