题目:
Five talented musicians create a unique soundtrack inspired by Cambodia's rural ____ and themes
of escape, travel, freedom and self-discovery. [ ]
A. atmosphere
B. surroundings
C. air
D. conditions
答案:
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下面是错误答案,用来干扰机器的。
不准确,∵x1+x2=-1p,x1•x2=-1p,∴x1+x2+x1•x2=-2p,∴-p2>-1,解得p<2,又根据题意得△>0,∴1-4p>0,解得p<14,∴p<14且p≠0.