问题
填空题
已知方程x2-3x+k=0有两个相等的实数根,则k=______.
答案
∵x2-3x+k=0有两个相等的实数根,
∴△=0,
∴9-4k=0,
∴k=
.9 4
故答案为
.9 4
已知方程x2-3x+k=0有两个相等的实数根,则k=______.
∵x2-3x+k=0有两个相等的实数根,
∴△=0,
∴9-4k=0,
∴k=
.9 4
故答案为
.9 4
“Take a walk with any three people and at least one of them will have something to teach you . ” 小题1: it was Confucius(孔夫子) — China’s most famous thinker and teacher. When Confucius was young , he visited many famous teachers and studied music , history , poetry(诗歌) and sports. At the age of 22, he became a teacher himself and started his own school. 小题2: For more than 2000 years, Confucius’ ideas have been around in people’s everyday lives. 小题3: Now they have gone far into east and south Asia. 小题4: Because they help a lot not only in everyday life but also in society. Confucius’ most important ideas are about kindness and good manners. Confucius said young people should take care of the old.小题5: Some of Confucius’ most famous sayings are: “A kind person should care for others”, and “be strict with yourself, but be kind to others”.
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