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...0.04 =-1 Since it's a left tailed test, the Critical Value=-Z(0.99)=-2.236 (Assume alpha=0.01). Test...

...08:53 補充： (2) f_x = 8x - 6 =0 => x = 3/4 f_y = 2y - 8 = 0 => y = 4 因此 critical point 在D以外，故本題只用考D的表面即4x^2 + y^2 =1 即原解中...

...minimum. fx=2(x-4); fy =2y , Letting fx=0, fy=0. we have (x, y)=(4,0) be a critical point. fxx=2; fxy= 0 = fyx ; fyy=2 . The Hessian matrix H(x...

...2+ 6/(x^4 y^2) 4/(x^3y^3) ] [ 4/(x^3 y^3) 2+6/(x^2 y^4) ] at the critical points, D= [ 8 4 ] or [ 8 -4 ] [ 4 8 ] [-4 8 ] both are...

...是否與點(0, 0)處相同呢? 重點是U(x,y)的等位線(Level curve)在 critical point處的表現情形,是sink, source,或saddle!(而且是都有可能!) 2008-05-28 00:27:05...

臨界點 ( critical point ) 包含以下三種: (1) 端點 (2) 奇異點 ( singular point ) , 即 f ' (x) 不...

...方程式 f_x(x, y) = 0 和 f_y(x, y) = 0 可得唯一解 (0, 0). 故 (0, 0) 是唯一的 critical point. 但觀察到 f(0, 0) = 10, f(0, y) = 6y^4 + 10 > 10 for any y>0, f...

... if H:I→R has a local extreme point, then the critical point M should satisfied H'(M) = 0 => f(M...