Ответы и объяснения

2012-06-27T22:51:40+04:00

Y`=(x^2-1)^1/2+2x*(x+1)/2*(x^2-1)^1/2=(x^2-1)^1/2+x*((x+1)^2/(x-1)*(x+1))^1/2=

=(x^2-1)^1/2+x*((x+1)/(x-1))^1/2

y``=2*x/2(x^2-1)^1/2+(x+1)/(x-1)+(x/2)*((x-1)/(x+1))^1/2*(-2/(x-1)^2)=

=x/(x^2-1)^1/2+((x+1)/(x-1))^1/2-(x/(x-1)^2)*((x-1)/(x+1))^1/2

y``(2)=2/3^1/2+3^1/2-2/3^1/2=3^1/2