原式=x^2/1/2+y^2/1=1 由b^2>a^2得焦點(diǎn)在y軸上
∴長(zhǎng)軸2a=2*1=2
短軸2b=2*根號(hào)2/2=根號(hào)2
離心率e=c/a=根號(hào)2/2
頂點(diǎn)(0,-1) (0,1) (根號(hào)2/2,0) (-根號(hào)2/2,0)
焦點(diǎn)坐標(biāo)(0,根號(hào)2) (0,-根號(hào)2)
2x^2+y^2=1,求橢圓的長(zhǎng)軸長(zhǎng),短軸長(zhǎng),離心率,頂點(diǎn),焦點(diǎn)坐標(biāo),急
2x^2+y^2=1,求橢圓的長(zhǎng)軸長(zhǎng),短軸長(zhǎng),離心率,頂點(diǎn),焦點(diǎn)坐標(biāo),急
數(shù)學(xué)人氣:267 ℃時(shí)間:2019-08-21 13:15:29
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