There is a parent parabola,which is stretch horizontally by a factor of 2 and vertically by a factor of 6,and shifted 7 units to the left then 8 units downwards.What is the equation of the resultant f...有一個(gè)拋物線的母函數(shù)（最簡單形式），被橫向拉長2倍，縱向拉長6倍，向上平移8個(gè)單位，向左平移7個(gè)單位。由以上步驟得到的新函數(shù)圖形的解析式是？