Ответы и объяснения

Лучший Ответ!
2013-03-22T13:29:46+00:00

1)(1+(3x+x^2)/(3+x))*(1/(x+1)-x/(1+2x+x^2))=

=1+*(3+x)/(3+x))*((x+1-x)/(x+1)^2=

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

=1/(x+1)

 

 

2)(1/(√2-1)+1/(√2+1))*(5√2-5)(√2+2)=

=((√2+1+√2-1)/1)*(10-5V2+10V2-10)=

=2V2*5V2=

=10*2=

=20