Question

daca a=0,(2) si b=0,(8) care este media aritmetica si cea geometrica a lui a si b

Answer 1

a=2/9
b=8/9
Media aritmetia=a+b/2=2/9+8/9/2=10/9/2=10/18=5/9
Media geometica=radical din a ori b=radical din 2/9 ori 8/9=radical din 16/81=4/9

Answer 2

a=0,(2)=2/9
b=0,(8)=8/9
Ma= (a+b)/2=(2/9+8/9)/2=10/9:2=10/9x1/2=10/18=simplif.cu 2=5/9=0,(5)
Mg=√ab=√(2/9x8/9)=√16/81=√16/√81=4/9=0,(4)