高一数学两题
1个回答
2016-09-19
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(1) 2m+1>=13, m>=6
3m-5<=22, m<=9
(2) 设A={x1,x2}, 则x1<=0, x2<=0
p=x1 * x2>=0
0<=p<=1
delta=4-4p>=0, p<=1
3m-5<=22, m<=9
(2) 设A={x1,x2}, 则x1<=0, x2<=0
p=x1 * x2>=0
0<=p<=1
delta=4-4p>=0, p<=1
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