问题
填空题
已知双曲线 2x2-y2=m的焦点在x轴,且一个焦点是(
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答案
双曲线2x2-y2=m,可化为
-x2 m 2
=1y2 m
∵焦点是(
,0),3
∴
+m=3,m 2
∴m=2,
故答案为:2
已知双曲线 2x2-y2=m的焦点在x轴,且一个焦点是(
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双曲线2x2-y2=m,可化为
-x2 m 2
=1y2 m
∵焦点是(
,0),3
∴
+m=3,m 2
∴m=2,
故答案为:2
根据句义和所给的首字母完成下列单词。 |
1. This is my b______, Jim. 3. My mother's sister is my a________. 5. I'm my father's s______. 7. Your aunt's son is your c________. 9. My grandfather is o______. | 2. My father's father is my g________. 4. My father's brother is my u______. 6. My sister is my mother's d_______. 8. My sister is y______. 10. This is Sam's f_______. |