Solve the problem. -Find the extreme values of f(x,y,z) =2x−3y+z subject to x2+y2=1 and y2+z2=1 .
A) Maximum: 32 at (21,−21,21) ; minimum: −32 at (−21,21,−21) B) Maximum: 22 at (21,−21,−21) ; minimum: −22 at (−21,21,21) C) Maximum: 2 at (−21,−21,21) ; minimum: −2 at (21,21,−21) D) Maximum: 42 at (21,21,21) ; minimum: −42 at (−21,−21,−21)
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