Y最大为4,经过点(3,1)(0,2),求函数解析式.这个嘛.给钱唉,正确率,上数学A本的.是(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)别搞错了对不起你
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Y最大为4,经过点(3,1)(0,2),求函数解析式.这个嘛.给钱唉,正确率,上数学A本的.是(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)别搞错了对不起你
Y最大为4,经过点(3,1)(0,2),求函数解析式.
这个嘛.给钱唉,正确率,上数学A本的.
是(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)别搞错了对不起你们。
Y最大为4,经过点(3,1)(0,2),求函数解析式.这个嘛.给钱唉,正确率,上数学A本的.是(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)(0-2)别搞错了对不起你
令y=a(x-h)^2+4
代入(3,1)得:1=a(1-h)^2+4,得a(1-h)^2=-3
代入(0,2)得:2=ah^2+4, 得ah^2=-2
两式相除:(1-h)^2/h^2=3/2
3h^2=2-4h+2h^2
h^2+4h-2=0
h=-2+√6, 或-2-√6
当h=-2+√6时,a=-2/h^2=-2/(10-4√6)=-(5+2√6),
当h=-2-√6时,a=-2/h^2=-2/(10+4√6)=-(5-2√6)
因此y有以上两个解析式.