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aflati nr. natural x astfel incat : x supra 2 =10 supra x+1

Răspuns :

x/2=10/x+1
x*(x+1)=20
x^2+x-20=0
x=-1+√1+80/2
x=-1-√1+80/2
x=-1+√81/2
x=-1-√81/2
x=-1+9/2
x=-1-9/2
x=4
x=-5





„CLAUAND„