若抛物线y^2=2px(p>0),的焦点与双曲线x^2/16-y2-19=1的右焦点重合,则p

问题描述:

若抛物线y^2=2px(p>0),的焦点与双曲线x^2/16-y2-19=1的右焦点重合,则p

x^2/16-y^2-19=1
x^2/16-y^2=20
x^2/320-y^2/20=1
a^2=320 b^2=20 c^2=a^2+b^2=340 C=√340
F(.√340,0)
p/2=√340,p=2√340=4√85