[填空题]
An object is placed 15 (r54 nu8tjs7tet j8 6pykq k-jcm from a certmbub,uuqw) 1fhn d+60ain mirror. The image is half the size of the object, inverted, and real. How far is the image from the mirror, and what is the radius of curvature h)1 +uq6,m ufdb0 wnubof the mirror?
$d_1$ = cm
r = cm
