點(diǎn)P（x,y)是雙曲線x^2/9-y^2/16=1上任意一點(diǎn),求x-y/2的取值范圍
點(diǎn)P（x,y)是雙曲線x^2/9-y^2/16=1上任意一點(diǎn),求x-y/2的取值范圍
數(shù)學(xué)人氣：719 ℃時(shí)間：2020-06-27 17:56:34
優(yōu)質(zhì)解答
設(shè)x-y/2=a,將之帶入雙曲線方程,最后等式中只存在a 與x或者是a與y,然后根據(jù)x小于-3或x大于3與y是一切實(shí)數(shù)即可求得a的范圍.
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