(1)
之后,A(4,0),可表示为Y = AX(X - 4)
经过B(3√3):3A =√3
= - √3/3,B = 4√3/3
抛物线的函数解析式为:y = - √3/3(2 - 4倍)
(2) / a>
t秒:P(T,0)
(一)Q AB
AB解析公式:(Y - 0)/(√3 - 0)=(X - 4) /(3 - 4),Y = - √(X - 4)
AB =√[(3 - 4)2 +(√3 - 0)2] = 2
0
(1)
之后,A(4,0),可表示为Y = AX(X - 4)
经过B(3√3):3A =√3
= - √3/3,B = 4√3/3
抛物线的函数解析式为:y = - √3/3(2 - 4倍)
(2) / a>
t秒:P(T,0)
(一)Q AB
AB解析公式:(Y - 0)/(√3 - 0)=(X - 4) /(3 - 4),Y = - √(X - 4)
AB =√[(3 - 4)2 +(√3 - 0)2] = 2
0