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.

题目

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.

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