双曲线x2-y2/2 =1在点(-√2,√2)处的切线的方程是( ). (A)y=-x+√2.(B)y=-x+3√2.(C)y=-2x-√2.(D)
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双曲线x2-y2/2 =1在点(-√2,√2)处的切线的方程是( ).
(A)y=-x+√2.
(B)y=-x+3√2.
(C)y=-2x-√2.
(D)y=-2x+3√2.
参考答案: