The graph of (x^2-1)y=x^2-4has:
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The graph of (x^2-1)y=x^2-4has:
A.one horizontal and one vertical asymptotes
B.two vertical but no horizontal asymptotes
C.one horizontal and two vertical asympototes
D.two horizontal and two vertical asymptotes
E.neither a horizontal nor a vertical asymptote
A.one horizontal and one vertical asymptotes
B.two vertical but no horizontal asymptotes
C.one horizontal and two vertical asympototes
D.two horizontal and two vertical asymptotes
E.neither a horizontal nor a vertical asymptote
答案为E
正确解法:用x表示y,如果分子中x的指数大于分母中x的指数,则无asymptotes
同理,用y表示x,如果分子中y的指数大于分母中y的指数,则无asymptotes
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