若a=1/(3-√8)-1/(√8-√7)+1/(√7-√6)-1/(√6-√5),则a的取值范围是?
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![若a=1/(3-√8)-1/(√8-√7)+1/(√7-√6)-1/(√6-√5),则a的取值范围是?](/uploads/image/z/5165807-23-7.jpg?t=%E8%8B%A5a%3D1%2F%283-%E2%88%9A8%29-1%2F%28%E2%88%9A8-%E2%88%9A7%29%2B1%2F%28%E2%88%9A7-%E2%88%9A6%29-1%2F%28%E2%88%9A6-%E2%88%9A5%29%2C%E5%88%99a%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AF%3F)
若a=1/(3-√8)-1/(√8-√7)+1/(√7-√6)-1/(√6-√5),则a的取值范围是?
若a=1/(3-√8)-1/(√8-√7)+1/(√7-√6)-1/(√6-√5),则a的取值范围是?
若a=1/(3-√8)-1/(√8-√7)+1/(√7-√6)-1/(√6-√5),则a的取值范围是?
分母有理化后
a=3+√8-√8-√7+√7+√6-√6-√5
a=3-√5