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Z x2. Z sqrt x 2+y 2 график. Z sqrt x 2+y 2. X^2+Y^2=Z^2. Конус z sqrt x 2+y 2.
Z sqrt x 2+y 2 график. Z sqrt x 2+y 2. X^2+Y^2=Z^2. Конус z sqrt x 2+y 2.