由椭圆的第一定义知|PF1|+|PF2|=2a=10,
故选D.
设p是椭圆x225+y216=1上的点.若F1,F2是椭圆的两个焦点,则|PF1|+|PF2|等于( ) A.4 B.5 C.8 D.10
设p是椭圆
+
=1上的点.若F1,F2是椭圆的两个焦点,则|PF1|+|PF2|等于( )
A. 4
B. 5
C. 8
D. 10
x2 |
25 |
y2 |
16 |
A. 4
B. 5
C. 8
D. 10
数学人气:463 ℃时间:2019-10-19 14:39:58
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