问题
填空题
若关于x的方程x2+(m-3)x+m=0的两个实数根是不相等的正数,则实数m的取值范围是______.
答案
若关于x的方程x2+(m-3)x+m=0的两个实数根是不相等的正数,
即x1>0,x2>0,且x1≠x2,
则△=(m-3) 2-4m>0 x 1+x 2=3-m>0 x 1•x 2=m>0
解得0<m<1
故实数m的取值范围是(0,1)
故答案为:(0,1)
若关于x的方程x2+(m-3)x+m=0的两个实数根是不相等的正数,则实数m的取值范围是______.
若关于x的方程x2+(m-3)x+m=0的两个实数根是不相等的正数,
即x1>0,x2>0,且x1≠x2,
则△=(m-3) 2-4m>0 x 1+x 2=3-m>0 x 1•x 2=m>0
解得0<m<1
故实数m的取值范围是(0,1)
故答案为:(0,1)
Your parents always tell you that a good education is the key to a bright future. The promise you made to finish your schooling has been completed. Another few years in some college classroom just doesn’t sound too attractive; so what are your choices? Let’s see, Choice One—You can live with your parents and do nothing. Or Choice Two—You could get yourself a job. Of course, there are other choices, but for this little discussion, we’ll just suppose that they aren’t related (有关的). OK, so Choice Two is obviously going to be more effective. You will finally enter the real world. Well, hopefully high school helped to give you some kind of an idea of what type of job you would like to enter. If not, then it would be a good idea to speak with an expert working in the field you may be interested in before you jump into a job that you won’t like. Gaining knowledge can be good by helping you find the job that you will enjoy doing. Another reason to get some valued things before working. Internships (见习) or volunteering are usually a good place to start. If you are ready to begin a job after high school, you will save money from college cost and happily making a living in your chosen jobs. From another point of view, jumping into the workforce (劳动力) is sometimes the only way to see for yourself if you are ready to work a 40-hour week yet. If you decide that full time work is not what you are ready for, then this may advise that you should go back to a university and get a certificate. Two different
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