20 10 analysis of the ninth math test in Hangzhou, Zhejiang Province - Training Enrollment Network

20 10 analysis of the ninth math test in Hangzhou, Zhejiang Province

Observation -2

X & gt-2 pushouts-1/2x

X<2 launches 1/2x

Control 1/2x < 1

- 1/2x & lt； 1,

See if it matches that inequality group, and the answer is D.

(The same form is enough, which is also an analysis method. )

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