Question

Demonstrati ca
A .a^2/x+b^2/y=>(a+b)^2/(x+y)
B.a^2/x+b^2/y+c^2/z=>(a+ b+c)^2/(x+y+z)

Determinati valoarea minima si maxima a expresiei E(x)=x/(x^2+2x+2)unde x e numar real

Fie ABCDun paralelogram in care avem M mij BC .N mij AM .si DNintersectat cu AC =P.CALCULATI RAPORTUL AP/PC

Answer 1

abc+bca+cab=100a+10b+c+100b+10c=a+100c+10a+b=111a+111b+111c= 111(a+b+c)=37×3 (a+b+c)=>37

Dupa trebe sa faci

5 ⇒18-5=13 , 2
2=x*13/100 ⇒x=2*100/13=15,68%