椭圆x^2/a^2+y^2/b^2=1(a>1)一个焦点为F1,点P在椭圆上,且/OP/=/OF1/,则三角形OPF1的面积椭圆x^2/a^2+y^2/b^2=1一个焦点为F1,点P在椭圆上,且/OP/=/OF1/,则三角形OPF1的面积为答案:1/2.报纸24-8
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![椭圆x^2/a^2+y^2/b^2=1(a>1)一个焦点为F1,点P在椭圆上,且/OP/=/OF1/,则三角形OPF1的面积椭圆x^2/a^2+y^2/b^2=1一个焦点为F1,点P在椭圆上,且/OP/=/OF1/,则三角形OPF1的面积为答案:1/2.报纸24-8](/uploads/image/z/11459745-9-5.jpg?t=%E6%A4%AD%E5%9C%86x%5E2%2Fa%5E2%2By%5E2%2Fb%5E2%3D1%EF%BC%88a%3E1%29%E4%B8%80%E4%B8%AA%E7%84%A6%E7%82%B9%E4%B8%BAF1%2C%E7%82%B9P%E5%9C%A8%E6%A4%AD%E5%9C%86%E4%B8%8A%2C%E4%B8%94%2FOP%2F%3D%2FOF1%2F%2C%E5%88%99%E4%B8%89%E8%A7%92%E5%BD%A2OPF1%E7%9A%84%E9%9D%A2%E7%A7%AF%E6%A4%AD%E5%9C%86x%5E2%2Fa%5E2%2By%5E2%2Fb%5E2%3D1%E4%B8%80%E4%B8%AA%E7%84%A6%E7%82%B9%E4%B8%BAF1%2C%E7%82%B9P%E5%9C%A8%E6%A4%AD%E5%9C%86%E4%B8%8A%2C%E4%B8%94%2FOP%2F%3D%2FOF1%2F%2C%E5%88%99%E4%B8%89%E8%A7%92%E5%BD%A2OPF1%E7%9A%84%E9%9D%A2%E7%A7%AF%E4%B8%BA%E7%AD%94%E6%A1%88%EF%BC%9A1%2F2.%E6%8A%A5%E7%BA%B824-8)
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椭圆x^2/a^2+y^2/b^2=1(a>1)一个焦点为F1,点P在椭圆上,且/OP/=/OF1/,则三角形OPF1的面积椭圆x^2/a^2+y^2/b^2=1一个焦点为F1,点P在椭圆上,且/OP/=/OF1/,则三角形OPF1的面积为答案:1/2.报纸24-8
椭圆x^2/a^2+y^2/b^2=1(a>1)一个焦点为F1,点P在椭圆上,且/OP/=/OF1/,则三角形OPF1的面积
椭圆x^2/a^2+y^2/b^2=1一个焦点为F1,点P在椭圆上,且/OP/=/OF1/,则三角形OPF1的面积
为
答案:1/2.
报纸24-8
椭圆x^2/a^2+y^2/b^2=1(a>1)一个焦点为F1,点P在椭圆上,且/OP/=/OF1/,则三角形OPF1的面积椭圆x^2/a^2+y^2/b^2=1一个焦点为F1,点P在椭圆上,且/OP/=/OF1/,则三角形OPF1的面积为答案:1/2.报纸24-8
我想你的答案可能是错了,我得的是b^2/2
方法:设P(m,n)
m^2+n^2=OP^2=c^2
m^2/a^2+n^2/b^2=1
求得:|n|=b^2/c
所以面积:1/2*c*|n|=b^2/2