A(x1,y1),B<img src="https://zk.995w.com/lqwvjeImg/95/9526cac34022ec67fa9ee5d555c393ae.png"style="width:74px;height:49px;">,C(x2,y2)为椭圆<img src="https://zk.995w.com/lqwvjeImg/dd/dd149433e73391819e01cf8d3786ddd6.png"style="width:86px;height:49px;">上三点,若F(0,4)与三点A、B、C的距离为等差数列,则y1+y2的值为( )<br>·<img src="https://zk.995w.com/lqwvjeImg/c8/c8f0e5f1064accf612bdf36552dac236.png"style="width:28px;height:50px;"><br>·<img src="https://zk.995w.com/lqwvjeImg/3a/3a52a58d39344211d660bd22f846043b.png"style="width:25px;height:44px;"><br>·<img src="https://zk.995w.com/lqwvjeImg/23/239a449ba885d54889513db606d0e64c.png"style="width:30px;height:53px;"><br>·<img src="https://zk.995w.com/lqwvjeImg/6a/6a45cdd94cb5416db318955478ba474f.png"style="width:25px;height:52px;">