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Find the Specific Function Value  Find f(3,0,9) when f(x,y,z)=3x2+3y2−z2\text { Find } f ( 3,0,9 ) \text { when } f ( x , y , z ) = 3 x ^ { 2 } + 3 y ^ { 2 } - z ^ { 2 }

Question 191

Multiple Choice

Find the specific function value.
-  Find f(3,0,9)  when f(x,y,z) =3x2+3y2−z2\text { Find } f ( 3,0,9 ) \text { when } f ( x , y , z ) = 3 x ^ { 2 } + 3 y ^ { 2 } - z ^ { 2 }


A) 108
B) -72
C) -49
D) -54

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