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Media arihmetica a doua nr reale x si y ste egala cu 18√2.determinati y daca:
a)x=2√ 2
b)x=6√2
c)x=9√2


Răspuns :

[tex] \frac{x+y}{2}=18 \sqrt{2} x= 2 \sqrt{2} =\ \textgreater \ y= 16 \sqrt(2) x=6 \sqrt(2) =\ \textgreater \ y=12 \sqrt{2}

 x=9 \sqrt{2} =\ \textgreater \ y=9 \sqrt{2} [/tex]