7.
已知\(F_{1}\)、\(F_{2}\)分别为椭圆\(C_{1}\):
\(( \)
\(a\)\( > \)
\(b\)\( > 0)\)的上、下焦点,其中\(F_{1}\)也是抛物线\(C_{2}\):
\(x\)\({\,\!}^{2}=4\)
\(y\)的焦点,点\(M\)是\(C_{1}\)与\(C_{2}\)在第二象限的交点,且\(|MF_{1}|=\)
.
\((\)Ⅰ\()\)求椭圆的方程;
\((\)Ⅱ\()\)已知点\(P(1,3)\)和圆\(O\):
\(x\)\({\,\!}^{2}+\)
\(y\)\({\,\!}^{2}=\)
\(b\)\({\,\!}^{2}\),过点\(P\)的动直线
\(l\)与圆\(O\)相交于不同的两点\(A\),\(B\),在线段\(AB\)取一点\(Q\), 满足:
\((λ\neq 0\)且\(λ\neq ±1)\),探究是否存在一条直线使得点\(Q\)总在该直线上,若存在求出该直线方程.