Ответы и объяснения

2013-10-05T11:23:54+04:00
1) a)=(3c^3) /(4b^2)  б)((u(u+1))/u^5=(u+1)/u^4  ,    в) (b+3c)/((d-3c)(b+3c))=1/(b-3c)
2) a) ((5d(d+e)-5e(d+e))/((d-e)(d+e))=((d+e)(d-e)*5)/((d-e)(d+e))=5
б)((5-uv)/(u(5+v))+5v/(5+v)=(5-uv+5uv)/(u(5+v))=(5+4uv)/(u(5+v))
b)=(e^2+4e-e^2)/(e+4)=4e/(e+4)
3)=5/((b-c)(b+c))  -8/((b(c-b))-13/(b(b+c))=(5b+8b+8c-13b+13c)/(b(b^2-c^2))=21c/(b^3-bc^2) , 4)=(5(b+7)-t(b+7))/((b-7)(b+7))=((b+7)(5-t))/((b-7)(b+7))=(5-t)/(b-7)
b=7,1  t=2,7   (5-2,7)(7,1-7)=2,3 * 0,1=0,23