发布网友 发布时间:2022-05-07 23:07
共1个回答
热心网友 时间:2023-11-19 11:27
4x是不是4^x? 令a=2^x,则4^x=a^2 y=a^2-2a+5 0<=x<=2 2^0<=2^x<=2^2 所以1<=a<=4 y=a^2-2a+5=(a-1)^2+4 1<=a<...热心网友 时间:2023-11-19 11:27
4x是不是4^x? 令a=2^x,则4^x=a^2 y=a^2-2a+5 0<=x<=2 2^0<=2^x<=2^2 所以1<=a<=4 y=a^2-2a+5=(a-1)^2+4 1<=a<...热心网友 时间:2023-11-19 11:27
4x是不是4^x? 令a=2^x,则4^x=a^2 y=a^2-2a+5 0<=x<=2 2^0<=2^x<=2^2 所以1<=a<=4 y=a^2-2a+5=(a-1)^2+4 1<=a<...热心网友 时间:2023-11-19 11:27
4x是不是4^x? 令a=2^x,则4^x=a^2 y=a^2-2a+5 0<=x<=2 2^0<=2^x<=2^2 所以1<=a<=4 y=a^2-2a+5=(a-1)^2+4 1<=a<...热心网友 时间:2023-11-19 11:27
4x是不是4^x? 令a=2^x,则4^x=a^2 y=a^2-2a+5 0<=x<=2 2^0<=2^x<=2^2 所以1<=a<=4 y=a^2-2a+5=(a-1)^2+4 1<=a<...热心网友 时间:2023-11-19 11:27
4x是不是4^x? 令a=2^x,则4^x=a^2 y=a^2-2a+5 0<=x<=2 2^0<=2^x<=2^2 所以1<=a<=4 y=a^2-2a+5=(a-1)^2+4 1<=a<...热心网友 时间:2023-11-19 11:27
4x是不是4^x? 令a=2^x,则4^x=a^2 y=a^2-2a+5 0<=x<=2 2^0<=2^x<=2^2 所以1<=a<=4 y=a^2-2a+5=(a-1)^2+4 1<=a<...热心网友 时间:2023-11-19 11:27
4x是不是4^x? 令a=2^x,则4^x=a^2 y=a^2-2a+5 0<=x<=2 2^0<=2^x<=2^2 所以1<=a<=4 y=a^2-2a+5=(a-1)^2+4 1<=a<...热心网友 时间:2023-11-19 11:27
4x是不是4^x? 令a=2^x,则4^x=a^2 y=a^2-2a+5 0<=x<=2 2^0<=2^x<=2^2 所以1<=a<=4 y=a^2-2a+5=(a-1)^2+4 1<=a<...